Portföyler
Yeni Portföye Ekle
İzle
hareket halinde
Uygulamadaki anlık bildirimler yoluyla gerçek zamanlı güncellemeler alın.
Uygulamayı Açı
Piyasa Değerine Göre En İyi Merkeziyetsiz Finans (DeFi) Coin'ler
Merkeziyetsiz Finans (DeFi) piyasa değeri bugün 88,8 Milyar dolardır ve son 24 saatte 4.6% oranında bir değişim olmuştur.
Vurgular
$88.701.708.094
DeFi Piyasa Değeri
4.6%
$227.254.753.508
ETH Piyasa Değeri
0.1%
%39,0
DeFi:ETH Oranı
$5.488.711.048
24Sa Ticaret Hacmi
%3,1
Defi Hakimiyeti (Küresele Karşı)
%19,9
Lido Staked Ether DeFi Hakimiyeti
$107.670.081.674
Toplam Kilitli Değer (TVL)
Filtreler
Piyasa Değeri (ABD Doları - $)
Bitiş:
24 Saatlik Hacim (ABD Doları - $)
Bitiş:
24 Saatlik Fiyat Değişimleri
Bitiş:
# | Coin | Fiyat | 1sa | 24sa | 7g | 30g | 24 Saatlik Hacim | Piyasa Değeri | FDV | Market Cap / FDV | Son 7 Gün | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
11 |
![]()
Lido Staked Ether
STETH
|
Satın Al
|
$1.881,93 | 0.3% | 0.0% | 8.7% | 19.7% | $20.885.357 | $17.663.823.087 | $17.663.823.087 | 1.0 |
|
|
14 |
![]()
Chainlink
LINK
|
Satın Al
|
$13,66 | 0.4% | 2.5% | 14.0% | 15.5% | $520.347.889 | $8.717.711.135 | $13.661.983.271 | 0.64 |
|
|
17 |
![]()
Wrapped stETH
WSTETH
|
$2.253,29 | 0.2% | 0.2% | 8.7% | 19.7% | $27.407.019 | $8.109.588.573 | $8.109.588.573 | 1.0 |
|
||
32 |
![]()
Hyperliquid
HYPE
|
$13,55 | 0.6% | 2.3% | 15.5% | 29.3% | $74.670.724 | $4.529.600.630 | $13.564.464.985 | 0.33 |
|
||
36 |
![]()
Uniswap
UNI
|
Satın Al
|
$6,13 | 0.3% | 0.9% | 12.8% | 21.9% | $144.499.352 | $3.683.877.357 | $6.134.856.281 | 0.6 |
|
|
38 |
![]()
Dai
DAI
|
Satın Al
|
$1,00 | 0.0% | 0.0% | 0.0% | 0.0% | $104.036.412 | $3.209.864.058 | $3.209.864.058 | 1.0 |
|
|
48 |
![]()
Ondo
ONDO
|
$0,8233 | 0.7% | 1.6% | 13.4% | 25.5% | $131.083.640 | $2.612.417.787 | $8.269.480.424 | 0.32 |
|
||
51 |
![]()
Ethereum Classic
ETC
|
Satın Al
|
$16,61 | 0.2% | 2.7% | 10.4% | 16.3% | $91.310.160 | $2.513.667.654 | $2.513.667.654 | 1.0 |
|
|
52 |
![]()
Aave
AAVE
|
Satın Al
|
$160,57 | 0.1% | 4.7% | 14.1% | 21.8% | $308.754.182 | $2.428.362.958 | $2.573.851.979 | 0.94 |
|
|
59 |
![]()
Ethena
ENA
|
$0,3594 | 0.5% | 0.7% | 15.9% | 13.7% | $162.496.835 | $1.900.897.154 | $5.394.210.074 | 0.35 |
|
||
75 |
![]()
Maker
MKR
|
Satın Al
|
$1.382,77 | 0.2% | 3.6% | 3.7% | 6.2% | $88.635.737 | $1.167.936.257 | $1.204.190.953 | 0.97 |
|
|
76 |
![]()
Jupiter
JUP
|
$0,4033 | 0.9% | 6.3% | 29.4% | 46.3% | $103.963.745 | $1.149.709.806 | $2.829.415.931 | 0.41 |
|
||
82 |
![]()
Binance Staked SOL
BNSOL
|
$131,50 | 0.3% | 2.1% | 12.5% | 20.8% | $3.273.971 | $1.024.765.186 | $1.024.765.186 | 1.0 |
|
||
92 |
![]()
Injective
INJ
|
Satın Al
|
$8,72 | 0.0% | 4.2% | 20.3% | 35.8% | $67.722.819 | $852.276.322 | $872.097.169 | 0.98 |
|
|
93 |
![]()
Sei
SEI
|
$0,1737 | 0.6% | 1.8% | 19.5% | 30.4% | $67.189.237 | $850.038.365 | $1.741.039.522 | 0.49 |
|
||
95 |
![]()
DeXe
DEXE
|
$14,70 | 0.8% | 19.3% | 15.1% | 20.6% | $89.608.713 | $840.405.723 | $1.420.274.197 | 0.59 |
|
||
100 |
![]()
Lido DAO
LDO
|
$0,8797 | 0.5% | 3.1% | 17.9% | 31.8% | $64.872.996 | $789.942.141 | $879.788.576 | 0.9 |
|
||
101 |
![]()
Berachain
BERA
|
$7,19 | 0.1% | 3.8% | 10.2% | 7.8% | $160.588.706 | $778.331.905 | $3.607.416.324 | 0.22 |
|
||
108 |
![]()
Jito
JTO
|
$2,27 | 0.0% | 4.6% | 8.7% | 13.2% | $45.152.930 | $709.972.183 | $2.276.381.711 | 0.31 |
|
||
109 |
![]()
Curve DAO
CRV
|
$0,5262 | 0.8% | 2.6% | 6.2% | 13.2% | $168.934.264 | $690.159.656 | $1.183.569.582 | 0.58 |
|
||
122 |
![]()
Marinade Staked SOL
MSOL
|
$161,76 | 0.4% | 1.8% | 12.2% | 20.6% | $7.210.579 | $609.731.369 | $609.731.369 | 1.0 |
|
||
126 |
![]()
PancakeSwap
CAKE
|
$1,87 | 0.2% | 7.4% | 22.4% | 0.2% | $102.364.818 | $552.332.895 | $699.498.266 | 0.79 |
|
||
127 |
![]()
Raydium
RAY
|
$1,90 | 2.3% | 5.6% | 8.2% | 22.9% | $77.784.188 | $551.880.690 | $1.053.191.989 | 0.52 |
|
||
129 |
![]()
Infrared Bera
IBERA
|
$7,26 | 0.3% | 3.2% | 9.9% | 2.7% | $798.058 | $542.532.210 | $542.532.210 | 1.0 |
|
||
134 |
![]()
Pyth Network
PYTH
|
$0,1422 | 0.0% | 3.5% | 18.3% | 30.2% | $46.788.277 | $516.535.959 | $1.424.931.190 | 0.36 |
|
||
139 |
![]()
Pendle
PENDLE
|
$3,07 | 1.5% | 6.7% | 4.8% | 9.3% | $122.494.866 | $492.508.109 | $859.245.704 | 0.57 |
|
||
140 |
![]()
dYdX
DYDX
|
$0,6317 | 0.1% | 4.1% | 16.1% | 14.1% | $18.781.606 | $490.187.457 | $490.187.457 | 1.0 |
|
||
149 |
![]()
Telcoin
TEL
|
$0,004946 | 0.2% | 1.4% | 23.5% | 46.5% | $2.776.747 | $455.501.085 | $495.650.422 | 0.92 |
|
||
150 |
![]()
Olympus
OHM
|
$27,35 | 0.5% | 2.6% | 4.9% | 14.4% | $7.483.784 | $447.907.300 | $450.536.663 | 0.99 |
|
||
167 |
![]()
Super OETH
SUPEROETHB
|
$1.883,53 | 0.4% | 0.1% | 8.8% | 19.8% | $426.262 | $407.240.340 | $407.240.340 | 1.0 |
|
||
168 |
![]()
THORChain
RUNE
|
$1,15 | 0.2% | 5.1% | 13.5% | 15.3% | $87.751.279 | $406.064.833 | $491.600.888 | 0.83 |
|
||
172 |
![]()
Compound
COMP
|
Satın Al
|
$43,87 | 0.4% | 15.9% | 3.7% | 14.5% | $349.458.342 | $392.758.182 | $439.326.874 | 0.89 |
|
|
175 |
![]()
StakeWise Staked ETH
OSETH
|
$1.963,75 | 0.3% | 0.1% | 8.9% | 20.1% | $7.885,22 | $381.243.833 | $381.243.833 | 1.0 |
|
||
176 |
![]()
tBTC
TBTC
|
$85.036,54 | 0.2% | 1.0% | 2.9% | 7.1% | $14.519.298 | $378.155.823 | $378.155.823 | 1.0 |
|
||
179 |
![]()
Reserve Rights
RSR
|
$0,006326 | 0.6% | 5.6% | 21.0% | 17.5% | $27.483.677 | $355.029.720 | $633.179.090 | 0.56 |
|
||
183 |
![]()
Frax
FRAX
|
Satın Al
|
$0,9991 | 0.0% | 0.0% | 0.0% | 0.3% | $5.345.459 | $348.355.320 | $348.355.320 | 1.0 |
|
|
187 |
![]()
Aerodrome Finance
AERO
|
$0,4266 | 0.1% | 5.7% | 20.9% | 35.5% | $23.975.046 | $342.212.602 | $667.246.096 | 0.51 |
|
||
188 |
![]()
cgETH Hashkey Cloud
CGETH.HASHKEY
|
$1.877,14 | 0.1% | 0.7% | 9.7% | 20.1% | $22,02 | $335.040.511 | $335.040.511 | 1.0 |
|
||
190 |
![]()
Terra
LUNC
|
$0,00005956 | 0.5% | 2.7% | 11.3% | 13.6% | $12.968.102 | $324.435.037 | $387.403.441 | 0.84 |
|
||
193 |
![]()
JUST
JST
|
$0,03208 | 0.5% | 4.1% | 3.7% | 1.5% | $38.643.690 | $317.828.049 | $317.828.049 | 1.0 |
|
||
194 |
![]()
Amp
AMP
|
$0,003761 | 0.3% | 4.4% | 11.6% | 25.1% | $10.813.190 | $316.939.043 | $375.027.395 | 0.85 |
|
||
198 |
![]()
Gnosis
GNO
|
$119,94 | 0.0% | 1.5% | 9.3% | 21.2% | $23.627.397 | $310.580.100 | $359.802.386 | 0.86 |
|
||
200 |
![]()
Solayer
LAYER
|
$1,45 | 0.5% | 4.0% | 2.7% | 54.2% | $88.191.273 | $304.450.772 | $1.449.765.579 | 0.21 |
|
||
206 |
![]()
Morpho
MORPHO
|
$1,20 | 1.6% | 5.8% | 19.3% | 40.7% | $20.559.978 | $284.871.970 | $1.199.272.148 | 0.24 |
|
||
213 |
![]()
Ether.fi Staked BTC
EBTC
|
$85.095,87 | 0.3% | 1.7% | 3.4% | 7.3% | $3.833.213 | $272.169.500 | $272.169.500 | 1.0 |
|
||
218 |
![]()
1inch
1INCH
|
Satın Al
|
$0,1919 | 0.2% | 2.1% | 12.0% | 21.6% | $22.041.677 | $264.496.176 | $287.887.184 | 0.92 |
|
|
232 |
![]()
cWBTC
CWBTC
|
$1.711,85 | 0.3% | 1.0% | 3.2% | 7.2% | $0,00 | $236.535.752 | $236.535.752 | 1.0 |
|
||
231 |
![]()
Frax Ether
FRXETH
|
$1.879,08 | 0.7% | 0.0% | 8.8% | 18.1% | $1.256.080 | $236.452.804 | $236.452.804 | 1.0 |
|
||
234 |
![]()
Synthetix Network
SNX
|
Satın Al
|
$0,6883 | 0.6% | 11.1% | 26.0% | 27.1% | $37.782.399 | $234.362.463 | $234.654.933 | 1.0 |
|
|
245 |
![]()
aBTC
ABTC
|
$85.044,11 | 0.3% | 0.7% | 3.8% | 7.1% | $401.622 | $214.491.185 | $214.491.185 | 1.0 |
|
||
246 |
![]()
dYdX
ETHDYDX
|
$0,6322 | 0.2% | 4.0% | 16.0% | 13.9% | $15.705.865 | $213.940.759 | $213.940.759 | 1.0 |
|
||
255 |
![]()
0x Protocol
ZRX
|
$0,2436 | 0.4% | 2.0% | 14.5% | 17.8% | $33.443.657 | $206.710.593 | $243.648.550 | 0.85 |
|
||
269 |
![]()
Stargate Finance
STG
|
$0,1946 | 0.3% | 3.2% | 14.3% | 23.5% | $6.174.808 | $189.195.590 | $194.752.917 | 0.97 |
|
||
277 |
![]()
Osmosis
OSMO
|
$0,2558 | 0.2% | 4.1% | 15.1% | 14.7% | $8.262.689 | $184.115.047 | $255.320.986 | 0.72 |
|
||
279 |
![]()
Staked Frax Ether
SFRXETH
|
$2.103,18 | 0.4% | 0.0% | 8.7% | 19.4% | $478.938 | $181.049.577 | $181.049.577 | 1.0 |
|
||
280 |
![]()
Fluid
FLUID
|
$4,58 | 0.1% | 0.1% | 11.2% | 31.2% | $15.020.269 | $180.905.602 | $458.722.785 | 0.39 |
|
||
284 |
![]()
Convex Finance
CVX
|
$2,17 | 0.4% | 3.8% | 11.4% | 9.1% | $19.716.640 | $178.136.416 | $216.968.006 | 0.82 |
|
||
289 |
![]()
DeepBook
DEEP
|
$0,06921 | 3.3% | 3.3% | 26.8% | 53.8% | $16.903.122 | $173.482.391 | $693.929.562 | 0.25 |
|
||
291 |
![]()
Frax Share
FXS
|
$1,93 | 1.3% | 4.3% | 18.5% | 16.5% | $16.125.478 | $171.319.311 | $192.041.624 | 0.89 |
|
||
300 |
![]()
Sun Token
SUN
|
$0,01663 | 1.1% | 0.8% | 0.5% | 5.9% | $32.968.494 | $163.551.325 | $331.006.611 | 0.49 |
|
||
301 |
![]()
yearn.finance
YFI
|
Satın Al
|
$4.820,74 | 0.1% | 2.1% | 12.1% | 14.6% | $24.830.679 | $163.032.105 | $176.914.052 | 0.92 |
|
|
302 |
![]()
Drift Protocol
DRIFT
|
$0,5526 | 0.2% | 5.1% | 14.6% | 17.8% | $24.846.210 | $162.338.072 | $554.021.423 | 0.29 |
|
||
303 |
![]()
Treehouse ETH
TETH
|
$2.256,47 | 0.1% | 0.0% | 8.7% | 19.5% | $1.175.995 | $161.826.106 | $161.826.106 | 1.0 |
|
||
313 |
![]()
Threshold Network
T
|
$0,01520 | 0.2% | 2.6% | 11.2% | 22.9% | $5.984.488 | $154.061.303 | $169.694.784 | 0.91 |
|
||
314 |
Tribe
TRIBE
|
$0,3377 | 0.0% | 0.1% | 0.3% | 23.5% | $59.235,14 | $153.831.369 | $338.079.382 | 0.46 |
|
||
330 |
![]()
WOO
WOO
|
$0,07345 | 0.3% | 6.1% | 24.0% | 35.0% | $19.917.485 | $141.067.324 | $163.122.096 | 0.86 |
|
||
331 |
![]()
Bybit Staked SOL
BBSOL
|
$135,38 | 0.3% | 1.9% | 12.3% | 20.8% | $376.244 | $140.175.022 | $140.175.022 | 1.0 |
|
||
340 |
![]()
LCX
LCX
|
$0,1437 | 0.1% | 2.9% | 12.9% | 28.6% | $638.834 | $135.326.602 | $136.622.426 | 0.99 |
|
||
351 |
![]()
MAG7.ssi
MAG7.SSI
|
$0,6699 | 0.1% | 0.3% | 8.4% | 15.7% | $1.385.010 | $129.790.919 | $129.790.919 | 1.0 |
|
||
352 |
![]()
Ether.fi
ETHFI
|
$0,5649 | 0.6% | 5.6% | 19.5% | 42.7% | $56.565.699 | $129.785.929 | $566.385.470 | 0.23 |
|
||
360 |
![]()
VVS Finance
VVS
|
$0.052590 | 1.6% | 3.4% | 1.9% | 23.6% | $584.571 | $124.705.584 | $243.558.552 | 0.51 |
|
||
363 |
![]()
Steakhouse USDC Morpho Vault
STEAKUSDC
|
$1,08 | 0.0% | 0.0% | 0.1% | 0.3% | $0,00 | $123.032.872 | $123.032.872 | 1.0 |
|
||
364 |
![]()
Orca
ORCA
|
$2,21 | 0.6% | 0.3% | 8.4% | 18.7% | $75.557.800 | $122.954.890 | $220.441.883 | 0.56 |
|
||
368 |
![]()
crvUSD
CRVUSD
|
$1,00 | 0.0% | 0.0% | 0.0% | 0.0% | $23.252.796 | $121.442.739 | $121.442.739 | 1.0 |
|
||
369 |
![]()
Loopring
LRC
|
$0,09715 | 0.3% | 4.5% | 15.2% | 20.7% | $11.231.132 | $121.058.206 | $133.482.975 | 0.91 |
|
||
374 |
![]()
GMX
GMX
|
$11,73 | 0.6% | 5.9% | 17.0% | 34.9% | $13.804.293 | $117.965.513 | $117.965.513 | 1.0 |
|
||
378 |
![]()
Nexus Mutual
NXM
|
$40,87 | 0.5% | 4.4% | 11.1% | 21.5% | $0,00 | $116.499.514 | $116.499.514 | 1.0 |
|
||
377 |
![]()
SyrupUSDC
SYRUPUSDC
|
$1,09 | 0.0% | 0.0% | 0.1% | 1.0% | $906.514 | $116.493.647 | $116.493.647 | 1.0 |
|
||
384 |
![]()
Sushi
SUSHI
|
$0,5857 | 0.1% | 4.6% | 18.2% | 29.2% | $31.423.309 | $113.034.619 | $165.151.209 | 0.68 |
|
||
389 |
![]()
Band Protocol
BAND
|
$0,7125 | 0.7% | 4.7% | 16.9% | 29.1% | $6.650.447 | $111.318.650 | $113.550.503 | 0.98 |
|
||
392 |
![]()
API3
API3
|
$0,9319 | 0.1% | 16.1% | 27.0% | 24.8% | $47.160.299 | $110.354.536 | $137.870.106 | 0.8 |
|
||
394 |
![]()
CoW Protocol
COW
|
$0,2638 | 0.6% | 6.7% | 19.1% | 18.9% | $18.228.791 | $109.892.615 | $264.059.200 | 0.42 |
|
||
395 |
![]()
Maple Finance
SYRUP
|
$0,1218 | 1.2% | 1.0% | 16.0% | 5.1% | $7.269.981 | $108.981.071 | $144.233.196 | 0.76 |
|
||
404 |
![]()
Sologenic
SOLO
|
$0,2589 | 1.3% | 2.7% | 4.0% | 24.5% | $1.562.526 | $103.461.404 | $103.461.404 | 1.0 |
|
||
410 |
![]()
UMA
UMA
|
$1,15 | 0.2% | 5.6% | 20.2% | 21.2% | $12.606.864 | $99.102.155 | $142.763.584 | 0.69 |
|
||
417 |
![]()
Clearpool
CPOOL
|
$0,1253 | 0.4% | 0.2% | 27.3% | 34.1% | $5.337.830 | $95.262.362 | $125.354.127 | 0.76 |
|
||
419 |
![]()
Aevo
AEVO
|
$0,1049 | 0.9% | 5.8% | 21.0% | 32.4% | $27.409.049 | $94.853.418 | $105.022.043 | 0.9 |
|
||
421 |
![]()
Bounce
AUCTION
|
$14,25 | 0.8% | 9.9% | 27.6% | 1.6% | $38.241.716 | $93.958.337 | $108.937.548 | 0.86 |
|
||
427 |
![]()
Lorenzo stBTC
STBTC
|
$84.408,67 | 0.1% | 0.6% | 3.5% | 7.5% | $46.517,05 | $92.354.267 | $92.354.267 | 1.0 |
|
||
428 |
![]()
Solana Name Service
FIDA
|
$0,09261 | 0.2% | 6.1% | 21.5% | 27.6% | $11.720.364 | $91.842.833 | $92.685.179 | 0.99 |
|
||
430 |
![]()
Rocket Pool
RPL
|
$4,28 | 0.1% | 6.2% | 22.9% | 30.7% | $10.254.009 | $90.848.192 | $90.848.192 | 1.0 |
|
||
434 |
![]()
Spell
SPELL
|
$0,0005648 | 0.5% | 6.5% | 16.3% | 27.4% | $15.088.996 | $89.864.945 | $110.723.923 | 0.81 |
|
||
439 |
![]()
Venus
XVS
|
$5,38 | 0.3% | 2.9% | 14.2% | 21.5% | $5.630.032 | $89.382.302 | $159.978.658 | 0.56 |
|
||
442 |
![]()
Velo
VELO
|
$0,01195 | 0.1% | 2.1% | 15.4% | 30.7% | $15.047.070 | $88.454.510 | $287.248.268 | 0.31 |
|
||
449 |
![]()
Orbs
ORBS
|
$0,01904 | 0.9% | 0.4% | 4.2% | 17.4% | $4.051.507 | $86.807.921 | $190.474.500 | 0.46 |
|
||
454 |
![]()
Optio
OPT
|
$0,01790 | 1.1% | 7.2% | 11.6% | 19.1% | $76.783,66 | $86.371.296 | $114.500.793 | 0.75 |
|
||
459 |
![]()
Usual
USUAL
|
$0,1139 | 1.3% | 8.3% | 23.7% | 51.0% | $23.536.480 | $85.892.599 | $94.627.082 | 0.91 |
|
||
461 |
![]()
cETH
CETH
|
$37,91 | 0.4% | 0.2% | 8.7% | 19.7% | $120,39 | $85.352.728 | $85.352.728 | 1.0 |
|
||
463 |
![]()
Origin Ether
OETH
|
$1.882,18 | 0.2% | 0.0% | 8.8% | 19.8% | $92.323,74 | $85.176.821 | $85.176.821 | 1.0 |
|
||
468 |
![]()
Relend USDC
REUSDC
|
$1,05 | 0.0% | 0.0% | 0.1% | 0.6% | $0,00 | $84.493.813 | $84.493.813 | 1.0 |
|
1162 sonuçtan 1 ile 100 arası gösteriliyor
Satırlar
Merkeziyetsiz Finans (DeFi) Kategorileri
Adı | 24sa | Piyasa Değeri |
---|---|---|
Tüm Merkeziyetsiz Finans (DeFi)
|
4.6%
|
$88.701.708.094
|
Liquid Staking
|
2.1%
|
|
Varlık Destekli Tokenlar
|
3.0%
|
|
Merkeziyetsiz Borsa (DEX)
|
2.2%
|
|
Restaking
|
2.6%
|
|
Yield Farming
|
2.3%
|
|
Borç Verme/Borç Alma
|
3.1%
|
|
Stablecoin Protocol
|
3.7%
|
|
Ether.fi Ecosystem
|
3.2%
|
|
Türevler
|
0.4%
|
|
BTCfi
|
5.1%
|
|
Önde Gelen Merkeziyetsiz Finans (DeFi) Sektörleri Piyasa Değeri Grafiği
Aşağıdaki grafik, Liquid Staking, Varlık Destekli Tokenlar ve diğerleri dahil olmak üzere, belirli bir süre içinde Merkeziyetsiz Finans (DeFi) alt kategorilerindeki piyasa değerini ve hakimiyetini göstermektedir.
Başlıca Merkeziyetsiz Finans (DeFi) Sektörleri Performans Grafiği
Aşağıdaki grafik, farklı dönemlerde piyasa değeri açısından kazanç ve kayıp yüzdelerini takip ederek Merkeziyetsiz Finans (DeFi) alt kategorilerinin zaman içindeki görece performansını göstermektedir.
Merkeziyetsiz Finans (DeFi) Son Haberleri

Borsada işlem gören XRP ve Solana ürünlerindeki girişler Ethereum'u solladı
CoinTelegraph Turkey
8 gün önce

Bitcoin Borsası Binance, Bu Altcoinin Ağ Yükseltmesini ve Hardfork’unu Destekleyeceğini Açıkladı
Bitcoin Sistemi
2 gün önce