Érmék: 17 128
Tőzsdék: 1 295
Piaci kapitalizáció: 2,757T $ 4.3%
24 órás forgalom: 151,8B $
Gas: 0.72 GWEI
Hirdetések kikapcsolása
Portfóliók
Hozzáadás az Új portfólióhoz
Nyomon követés
útközben
Fogadd a legfrissebb információkat valós időben az alkalmazásbeli push értesítések útján.
Alkalmazás megnyitása

Legnagyobb Base Meme érmék piaci kapitalizáció szerint

A Base Meme piaci kap. ma 800 millió, -13.0% változás az elmúlt 24 órában.
Kiemelt információk
Szűrők
Piaci kap. (amerikai dollár - $)
eddig
Kérjük, adjon meg egy érvényes tartományt az alacsonytól a magasig.
24 órás forgalom (amerikai dollár - $)
eddig
Please enter a valid range from low to high.
24 órás árfolyamváltozások
eddig
Please enter a valid range from low to high.
# Érme Árfolyam 1 ó 24 ó 7 n 30 n 24 órás forgalom Piaci kapitalizáció FDV Piaci kapitalizáció/FDV Utolsó 7 nap
199 BRETT
Brett
BRETT
$0,03002 0.1% 4.3% 20.5% 15.4% $47666734 $297822826 $297822826 1.0 brett (BRETT) 7d chart
393 TOSHI
Toshi
TOSHI
$0,0002476 3.4% 10.5% 28.4% 37.6% $19084870 $104373516 $104373516 1.0 toshi (TOSHI) 7d chart
566 DEGEN
Degen
DEGEN
$0,002602 2.4% 7.4% 24.7% 33.4% $20907212 $58184776 $96567969 0.6 degen (DEGEN) 7d chart
658 PONKE
PONKE
PONKE
$0,08128 1.9% 6.7% 27.8% 29.0% $12082930 $44683251 $45256098 0.99 ponke (PONKE) 7d chart
694 DOGINME
doginme
DOGINME
$0,0005955 10.7% 28.6% 49.5% 103.9% $18501285 $40588480 $40588480 1.0 doginme (DOGINME) 7d chart
742 SKI
Ski Mask Dog
SKI
$0,03623 0.9% 7.1% 31.4% 40.2% $1181283 $36196825 $36196825 1.0 ski mask dog (SKI) 7d chart
854 FARTCOIN
Based Fartcoin
FARTCOIN
$0,0002847 2.5% 13.1% 0.6% 158.2% $1186033 $28527318 $28527318 1.0 based fartcoin (FARTCOIN) 7d chart
869 KEYCAT
Keyboard Cat (Base)
KEYCAT
$0,002739 2.0% 28.4% 41.0% 67.8% $10142071 $27403460 $27403460 1.0 keyboard cat (base) (KEYCAT) 7d chart
959 MIGGLES
Mr. Miggles
MIGGLES
$0,02429 2.9% 15.5% 30.1% 37.1% $3510954 $23290566 $23290566 1.0 mr. miggles (MIGGLES) 7d chart
1132 PEPE
Based Pepe
PEPE
Vétel
$0.073934 0.6% 2.2% 11.4% 1.1% $601774 $16598112 $16598112 1.0 based pepe (PEPE) 7d chart
1161 BENJI
Basenji
BENJI
$0,01566 0.5% 6.5% 9.8% 17.8% $4245630 $15661648 $15661648 1.0 basenji (BENJI) 7d chart
1404 TYBG
Base God
TYBG
$0,00008439 1.7% 10.0% 28.3% 19.4% $147968 $10403263 $10403263 1.0 base god (TYBG) 7d chart
1407 MOCHI
Mochi
MOCHI
$0,00001035 0.2% 15.2% 29.7% 41.6% $199351 $10345574 $10345574 1.0 mochi (MOCHI) 7d chart
1475 DRB
DebtReliefBot
DRB
$0,00009269 1.3% 14.4% 56.7% - $5179823 $9315120 $9315120 1.0 debtreliefbot (DRB) 7d chart
1551 MFER
mfercoin
MFER
$0,008302 1.0% 7.6% 24.5% 17.2% $1362246 $8301830 $8301830 1.0 mfercoin (MFER) 7d chart
1728 AEROBUD
AEROBUD
AEROBUD
$0,006126 0.7% 8.2% 15.4% 26.2% $247315 $6141509 $6141509 1.0 aerobud (AEROBUD) 7d chart
1784 TOBY
Toby ToadGod
TOBY
$0.071466 1.2% 1.2% 21.8% 28.4% $73000 $5547115 $6163484 0.9 toby toadgod (TOBY) 7d chart
1869 BAMBOO
Bamboo on Base
BAMBOO
$0,004782 0.6% 1.8% 5.8% 14.4% $15000 $4786534 $4786534 1.0 bamboo on base (BAMBOO) 7d chart
1870 AKUMA
Akuma Inu
AKUMA
$0.057159 0.3% 6.0% 24.5% 6.6% $74000 $4776184 $4776184 1.0 akuma inu (AKUMA) 7d chart
1875 HIGHER
higher
HIGHER
$0,004709 1.8% 8.4% 38.6% 46.9% $334282 $4703876 $4703876 1.0 higher (HIGHER) 7d chart
1930 BRAT
Brat
BRAT
$0,004492 2.4% 2.0% 9.0% 41.2% $134825 $4342599 $4342599 1.0 brat (BRAT) 7d chart
2109 CHOMP
ChompCoin
CHOMP
$0,03706 2.1% 5.9% 24.7% 19.7% $83000 $3492555 $3492555 1.0 chompcoin (CHOMP) 7d chart
2221 MOEW
MOEW
MOEW
$0,0004577 0.8% 13.6% 30.5% 1.4% $2022317 $3085738 $3085738 1.0 moew (MOEW) 7d chart
2516 BOOMER
Boomer
BOOMER
$0,002423 0.1% 5.5% 19.4% 10.3% $851725 $2245542 $2245542 1.0 boomer (BOOMER) 7d chart
2555 OKAYEG
Okayeg
OKAYEG
$0.055077 4.2% 9.4% 25.0% 61.3% $48000 $2132941 $2132941 1.0 okayeg (OKAYEG) 7d chart
2570 MARSO
Marso.Tech
MARSO
$0,0002003 - - - - $19 $2110935 $2818327 0.75 marso.tech (MARSO) 7d chart
2645 ANDY
Andy
ANDY
$0,001974 1.6% 1.8% 19.3% 48.6% $30000 $1974492 $1974492 1.0 andy (ANDY) 7d chart
2751 RUSSELL
RUSSELL
RUSSELL
$0,00181 0.1% 10.5% 24.1% 26.5% $77000 $1758066 $1758066 1.0 russell (RUSSELL) 7d chart
2774 SKOP
Skull of Pepe Token
SKOP
$0,01122 2.0% 9.5% 11.9% 38.3% $327099 $1708855 $1708855 1.0 skull of pepe token (SKOP) 7d chart
2806 PEEZY
Young Peezy AKA Pepe
PEEZY
$0,001651 1.2% 7.5% 26.5% 22.1% $2800 $1650601 $1650601 1.0 young peezy aka pepe (PEEZY) 7d chart
2949 CHAD
Based Chad
CHAD
$0,00002091 0.6% 13.4% 25.9% 24.5% $15000 $1452538 $1452538 1.0 based chad (CHAD) 7d chart
2965 YUKO
YUKO
YUKO
$0,001427 - - - - $2,7 $1426795 $1426795 1.0 yuko (YUKO) 7d chart
3001 DICKBUTT
Dickbutt
DICKBUTT
$0,00001374 0.0% 6.9% 26.1% 44.2% $17000 $1374905 $1374905 1.0 dickbutt (DICKBUTT) 7d chart
3010 DREAM
DREAM
DREAM
$0,001364 0.7% 0.4% 35.7% 60.1% $98000 $1360902 $1360902 1.0 dream (DREAM) 7d chart
3020 NATO
The Nation Token
NATO
$0.051368 1.4% 2.1% 14.9% 105.3% $155183 $1345894 $1345894 1.0 the nation token (NATO) 7d chart
3046 SIMMI
Simmi Token
SIMMI
$0,00001312 0.5% 17.8% 0.8% 20.7% $141407 $1313456 $1313456 1.0 simmi token (SIMMI) 7d chart
3122 TN100X
TN100x
TN100X
$0,0001936 1.9% 20.4% 33.0% 45.9% $37000 $1210281 $1876455 0.64 tn100x (TN100X) 7d chart
3217 FLOPPA
Floppa Cat
FLOPPA
$0,001107 1.3% 21.2% 39.8% 38.1% $23000 $1106773 $1106773 1.0 floppa cat (FLOPPA) 7d chart
3246 NORMIE
NORMIE
NORMIE
$0,001106 1.6% 9.4% 32.2% 30.8% $13000 $1079060 $1079060 1.0 normie (NORMIE) 7d chart
3272 CRASH
Crash On Base
CRASH
$0,001099 0.6% 1.7% 9.7% 19.6% $7900 $1052263 $1052263 1.0 crash on base (CRASH) 7d chart
3331 ELONRWA
ElonRWA
ELONRWA
$0,00003038 0.9% 7.1% 28.0% 27.7% $5100 $990779 $2119072 0.47 elonrwa (ELONRWA) 7d chart
3341 PIGGY
Piggy
PIGGY
$0,00001553 0.2% 9.1% 33.3% 84.8% $5200 $979337 $979337 1.0 piggy (PIGGY) 7d chart
3357 WEIRDO
Weirdo
WEIRDO
$0,0000139 0.9% 10.7% 2.8% 8.4% $5200 $967130 $967130 1.0 weirdo (WEIRDO) 7d chart
3374 TONY
Big Tony
TONY
$0.059593 0.7% 0.2% 7.0% 46.7% $6800 $958292 $958292 1.0 big tony (TONY) 7d chart
3478 BOOSHI
Booshi
BOOSHI
$0,00008617 - - - - $110 $861721 $861721 1.0 booshi (BOOSHI) 7d chart
3577 DIME
Dimes
DIME
$0.057948 0.2% 25.0% 38.5% - $60000 $794756 $794756 1.0 dimes (DIME) 7d chart
3617 $PANANA
Panana
$PANANA
$0.051954 0.8% 6.0% 13.5% 21.4% $370 $768228 $808660 0.95 panana ($PANANA) 7d chart
3618 LUM
Luminous
LUM
$0,7624 3.7% 10.6% 32.7% 49.2% $170615 $766832 $766832 1.0 luminous (LUM) 7d chart
3704 CONDO
CONDO
CONDO
$0,00007218 - 3.8% 23.9% 42.3% $210 $721790 $721790 1.0 condo (CONDO) 7d chart
3717 BARIO
Based Bario
BARIO
$0,0007157 0.6% 5.6% 31.8% 18.5% $145190 $714966 $714966 1.0 based bario (BARIO) 7d chart
3742 WOOF
WoofWork.io
WOOF
$0,00008815 0.4% 1.8% 13.0% 16.6% $3500 $696602 $696602 1.0 woofwork.io (WOOF) 7d chart
3799 CLANKFUN
clank.fun
CLANKFUN
$0.056619 4.4% 19.6% 42.6% 53.5% $29000 $663582 $663582 1.0 clank.fun (CLANKFUN) 7d chart
3803 BRIAN
Brian
BRIAN
$0,0006782 0.5% 1.2% 13.3% 22.6% $8700 $659685 $659685 1.0 brian (BRIAN) 7d chart
3880 LUCKY
Lucky Dog
LUCKY
$0,00007989 1.4% 3.7% 25.4% 28.1% $1300 $621354 $621354 1.0 lucky dog (LUCKY) 7d chart
3906 GRK
Grokster
GRK
$0.056091 4.3% 7.3% 8.5% - $29000 $608530 $608530 1.0 grokster (GRK) 7d chart
3946 CARLO
Carlo
CARLO
$0,0005905 3.0% 14.5% 49.7% 49.8% $18000 $592177 $592177 1.0 carlo (CARLO) 7d chart
3972 BENI
Beni
BENI
$0,0005765 1.0% 6.1% 15.9% 39.1% $2000 $571633 $571633 1.0 beni (BENI) 7d chart
4029 $SHARBI
Sharbi
$SHARBI
$0.057253 1.4% 0.7% 0.1% 10.6% $2700 $541535 $541535 1.0 sharbi ($SHARBI) 7d chart
4229 CHUCK
Chuck
CHUCK
$0,0005046 0.7% 0.2% 7.3% 9.7% $133106 $459232 $497167 0.92 chuck (CHUCK) 7d chart
4237 WGC
Wild Goat Coin
WGC
$0,00009119 0.5% 11.7% 25.9% 6.1% $700 $456995 $456995 1.0 wild goat coin (WGC) 7d chart
4262 COINYE
Coinye West
COINYE
$0,0005072 0.9% 5.1% 32.7% 19.9% $1200 $446138 $507236 0.88 coinye west (COINYE) 7d chart
4294 NORMILIO
Normilio
NORMILIO
$0,0004754 1.4% 17.1% 37.7% 43.5% $6800 $434595 $434595 1.0 normilio (NORMILIO) 7d chart
4348 PONCHO
Poncho
PONCHO
$0,04128 1.0% 17.9% 24.6% 18.2% $18000 $413083 $413083 1.0 poncho (PONCHO) 7d chart
4382 ANON
Anon
ANON
$0,0004006 1.1% 7.0% 7.9% 55.5% $593399 $400997 $400997 1.0 anon (ANON) 7d chart
4389 ROOST
Roost
ROOST
$0,0003988 0.4% 3.9% 36.0% 42.7% $6700 $398754 $398754 1.0 roost (ROOST) 7d chart
4515 GEKO
Geko Base
GEKO
$0,0003586 0.8% 13.4% 27.1% 54.1% $1900 $359447 $359447 1.0 geko base (GEKO) 7d chart
4547 SNAIL
SnailBrook
SNAIL
$0.054253 - 3.2% 26.7% 30.3% $560 $350351 $350351 1.0 snailbrook (SNAIL) 7d chart
4579 MONSTA
Based Monsta
MONSTA
$0,00003687 0.7% 21.2% 22.8% 26.5% $6700 $342394 $363238 0.94 based monsta (MONSTA) 7d chart
4619 BARRY
Barry the badger
BARRY
$0,0003386 1.3% 8.5% 9.2% 51.0% $287856 $332889 $332889 1.0 barry the badger (BARRY) 7d chart
4636 $PRO
ProductClank
$PRO
$0.053290 0.8% 9.4% 11.4% - $6300 $328994 $328994 1.0 productclank ($PRO) 7d chart
4658 GMB
GMBase
GMB
$0,0004173 0.6% 9.4% 19.8% 40.7% $620 $323871 $398153 0.81 gmbase (GMB) 7d chart
4673 WEWE
WEWECOIN
WEWE
$0.053197 0.0% 1.4% 14.8% 65.6% $45 $319907 $319907 1.0 wewecoin (WEWE) 7d chart
4682 BRIUN
Briun Armstrung
BRIUN
$0,0004137 0.8% 7.4% 25.9% 23.5% $640 $318552 $318552 1.0 briun armstrung (BRIUN) 7d chart
4726 $LOCKIN
Lock In on Base
$LOCKIN
$0,0003057 - - - - $27 $305720 $305720 1.0 lock in on base ($LOCKIN) 7d chart
4768 SKICAT
SKI MASK CAT
SKICAT
$0,0002992 0.2% 3.6% 30.0% 30.0% $1156575 $296388 $296388 1.0 ski mask cat (SKICAT) 7d chart
4785 GUAN
Guanciale by Virtuals
GUAN
$0,0002962 1.3% 2.5% 23.1% 55.7% $127905 $289184 $289184 1.0 guanciale by virtuals (GUAN) 7d chart
4899 RUNNER
RUNNER
RUNNER
$0,2627 2.8% 5.3% 56.1% 6.1% $9200 $263156 $263156 1.0 runner (RUNNER) 7d chart
4907 DOOMER
DOOMER
DOOMER
$0,0002904 0.8% 3.4% 12.4% 21.1% $16 $261758 $290842 0.9 doomer (DOOMER) 7d chart
4994 CRAPPY
Crappy Bird CTO
CRAPPY
$0,0002009 - - - - $120 $240902 $240902 1.0 crappy bird cto (CRAPPY) 7d chart
5023 COIN
Coin on Base
COIN
$0.052416 1.0% 6.1% 98.1% 110.1% $3000 $235715 $235715 1.0 coin on base (COIN) 7d chart
5034 TURBO
Based Turbo
TURBO
$0.053577 2.5% 0.7% 33.8% 71.6% $29000 $233440 $233440 1.0 based turbo (TURBO) 7d chart
5087 TIMI
This Is My Iguana
TIMI
$0,0002367 1.0% 10.4% 31.0% 13.9% $4600 $222999 $222999 1.0 this is my iguana (TIMI) 7d chart
5154 EBERT
EBERT
EBERT
$0,0004701 0.8% 4.0% 7.4% 24.9% $11 $209443 $209443 1.0 ebert (EBERT) 7d chart
5159 WOLF
Landwolf
WOLF
$0.094962 1.0% 1.1% 20.7% 26.8% $1300 $208741 $208741 1.0 landwolf (WOLF) 7d chart
5241 FLIES
MUTATIO
FLIES
$0,3436 0.2% 30.7% 1.2% 28.2% $20 $193279 $193279 1.0 mutatio (FLIES) 7d chart
5297 CORGI
Corgi
CORGI
$0,000185 1.0% 3.4% 12.2% 14.6% $120 $184967 $184967 1.0 corgi (CORGI) 7d chart
5302 BUTTHOLE
Based Butthole
BUTTHOLE
$0.051840 1.0% 0.9% 17.3% 36.2% $1700 $184351 $184351 1.0 based butthole (BUTTHOLE) 7d chart
5307 ACTUAL
ACTUAL
ACTUAL
$0,0001837 0.2% 1.4% 23.5% 54.9% $9,8 $183720 $183720 1.0 actual (ACTUAL) 7d chart
5320 MVP
MAGA VP
MVP
$0,004089 1.0% 4.3% 21.4% 35.4% $760 $182002 $194747 0.93 maga vp (MVP) 7d chart
5329 GDUPI
redacted gdupi
GDUPI
$0.051804 2.8% 7.2% 20.7% 29.1% $750 $180850 $180850 1.0 redacted gdupi (GDUPI) 7d chart
5361 PEPEC
Pepe Clanker
PEPEC
$0,1765 0.4% 7.5% 24.8% 41.2% $1500 $176893 $176893 1.0 pepe clanker (PEPEC) 7d chart
5425 AYB
All Your Base
AYB
$0.078426 1.0% 5.3% 9.8% 36.7% $200 $168012 $168012 1.0 all your base (AYB) 7d chart
5434 BEMU
BEMU
BEMU
$0,00001664 0.6% 14.8% 41.9% - $41000 $166810 $166810 1.0 bemu (BEMU) 7d chart
5436 $BLU
Blu
$BLU
$0,0001696 3.1% 0.4% 5.7% 21.8% $127023 $166350 $166350 1.0 blu ($BLU) 7d chart
5460 PICA
Pineapple Cat
PICA
$0,00001708 1.0% 15.3% 31.2% 33.2% $3600 $162619 $170836 0.95 pineapple cat (PICA) 7d chart
5493 DOG
Basic Dog Meme
DOG
$0,0001575 1.2% 3.9% 27.2% 46.9% $90 $157531 $157531 1.0 basic dog meme (DOG) 7d chart
5541 BONKEY
Bonkey
BONKEY
$0,000171 1.1% 8.3% 16.8% 12.4% $380 $152076 $152076 1.0 bonkey (BONKEY) 7d chart
5660 GHFFB47YII2RTEEYY10OP
ghffb47yii2rteeyy10op
GHFFB47YII2RTEEYY10OP
$0.051372 0.8% 4.1% 14.7% 37.2% $78 $137490 $137490 1.0 ghffb47yii2rteeyy10op (GHFFB47YII2RTEEYY10OP) 7d chart
5650 BRETT2.0
Brett 2.0
BRETT2.0
$0,0001553 1.9% 3.1% 30.5% 0.7% $128800 $136178 $154513 0.88 brett 2.0 (BRETT2.0) 7d chart
5742 $WSB
Agent Zero
$WSB
$0,006106 - 4.2% 8.8% 41.9% $56 $128219 $128219 1.0 agent zero ($WSB) 7d chart
1–100. látható az összesen 209 találatból
Sorok
Legnépszerűbb Base Meme érmék piaci kap. grafikon
Legnépszerűbb Base Meme érmék teljesítményének grafikon
Az alábbi grafikon a relatív teljesítményét mutatja Legnépszerűbb Base Meme érmék idő múlásával, nyomon követve azok százalékos nyereségeit és veszteségeit ár árfolyam különböző időszakokban.
Új portfólió
Ikon és név
Valuta kiválasztása
Javasolt devizák
USD
US Dollar
IDR
Indonesian Rupiah
TWD
New Taiwan Dollar
EUR
Euro
KRW
South Korean Won
JPY
Japanese Yen
RUB
Russian Ruble
CNY
Chinese Yuan
Rendeleti devizák
AED
United Arab Emirates Dirham
ARS
Argentine Peso
AUD
Australian Dollar
BDT
Bangladeshi Taka
BHD
Bahraini Dinar
BMD
Bermudian Dollar
BRL
Brazil Real
CAD
Canadian Dollar
CHF
Swiss Franc
CLP
Chilean Peso
CZK
Czech Koruna
DKK
Danish Krone
GBP
British Pound Sterling
GEL
Georgian Lari
HKD
Hong Kong Dollar
HUF
Hungarian Forint
ILS
Israeli New Shekel
INR
Indian Rupee
KWD
Kuwaiti Dinar
LKR
Sri Lankan Rupee
MMK
Burmese Kyat
MXN
Mexican Peso
MYR
Malaysian Ringgit
NGN
Nigerian Naira
NOK
Norwegian Krone
NZD
New Zealand Dollar
PHP
Philippine Peso
PKR
Pakistani Rupee
PLN
Polish Zloty
SAR
Saudi Riyal
SEK
Swedish Krona
SGD
Singapore Dollar
THB
Thai Baht
TRY
Turkish Lira
UAH
Ukrainian hryvnia
VEF
Venezuelan bolívar fuerte
VND
Vietnamese đồng
ZAR
South African Rand
XDR
IMF Special Drawing Rights
Kriptodevizák
BTC
Bitcoin
ETH
Ether
LTC
Litecoin
BCH
Bitcoin Cash
BNB
Binance Coin
EOS
EOS
XRP
XRP
XLM
Lumens
LINK
Chainlink
DOT
Polkadot
YFI
Yearn.finance
Bitcoin egységek
BITS
Bits
SATS
Satoshi
Nyersanyagok
XAG
Silver - Troy Ounce
XAU
Gold - Troy Ounce
Nyelv kiválasztása
Népszerű nyelvek
EN
English
RU
Русский
DE
Deutsch
PL
język polski
ES
Español
VI
Tiếng việt
FR
Français
PT
Português
Minden nyelv
AR
العربية
BG
български
CS
čeština
DA
dansk
EL
Ελληνικά
FI
suomen kieli
HE
עִבְרִית
HI
हिंदी
HR
hrvatski
HU
Magyar nyelv
ID
Bahasa Indonesia
IT
Italiano
JA
日本語
KO
한국어
LT
lietuvių kalba
NL
Nederlands
NO
norsk
RO
Limba română
SK
slovenský jazyk
SL
slovenski jezik
SV
Svenska
TH
ภาษาไทย
TR
Türkçe
UK
украї́нська мо́ва
ZH
简体中文
ZH-TW
繁體中文
Bejelentkezés
A folytatással elfogadod a CoinGecko Szolgáltatási feltételek dokumentumát, és elismered, hogy elolvastad a(z) Adatvédelmi irányelvek dokumentumot
vagy
Elfelejtette a jelszavát?
Nem kapta meg a megerősítő levelet?
Megerősítő levél újraküldése
Feliratkozás
A folytatással elfogadod a CoinGecko Szolgáltatási feltételek dokumentumát, és elismered, hogy elolvastad a(z) Adatvédelmi irányelvek dokumentumot
vagy
A jelszónak legalább 8 karaktert kell tartalmaznia, köztük 1 nagybetűt, 1 kisbetűt, 1 számot és 1 különleges karaktert
Nem kapta meg a megerősítő levelet?
Megerősítő levél újraküldése
Elfelejtette a jelszavát?
A megadott címre egy email érkezik hamarosan a további teendőkről.
Megerősítő levél újraküldése
A megadott címre egy email érkezik a megerősítő linkkel.
Letöltöm a CoinGecko alkalmazást.
Olvasd le ezt a QR-kódot, és töltsd le az alkalmazást App QR Code Vagy nézd meg az alkalmazás-áruházban
coingecko
Folytatás az appban
Valós idejű árkövetés
Alkalmazás megnyitása