Decentralized finance (DeFi) has taken the crypto world by storm in recent years. One of the most popular DeFi applications is yield farming, which allows users to earn rewards in the form of tokens by staking their crypto assets in liquidity pools. These rewards can be substantial, but yield farming can also be risky, as the value of the tokens being farmed can be highly volatile.

As of May 15, 2023, the current crypto DeFi yield farming rankings are as follows:

1. PancakeSwap (CAKE)

PancakeSwap is a decentralized exchange (DEX) built on the Binance Smart Chain (BSC). It's currently the largest DEX on BSC and the second-largest DEX overall, with a 24-hour trading volume of over $5 billion. PancakeSwap offers a wide variety of yield farming pools, with rewards paid out in its native token, CAKE. The APYs (annual percentage yields) on PancakeSwap can be extremely high, with some pools offering over 10,000% APY.

2. SushiSwap (SUSHI)

SushiSwap is another DEX that allows users to trade crypto assets and earn rewards through yield farming. It was originally built on the Ethereum blockchain but has since expanded to other blockchains, including BSC and Polygon. SushiSwap offers a range of yield farming pools, with rewards paid out in its native token, SUSHI. The APYs on SushiSwap can be high, with some pools offering over 5,000% APY.

3. Curve (CRV)

Curve is a DEX that specializes in stablecoin trading and yield farming. It's built on the Ethereum blockchain and offers a variety of yield farming pools, with rewards paid out in its native token, CRV. The APYs on Curve can be lower than on other platforms, with some pools offering around 2% to 5% APY.

4. Aave (AAVE)

Aave is a DeFi platform that allows users to lend and borrow crypto assets. It also offers yield farming opportunities through its liquidity mining program. Aave rewards users with its native token, AAVE, for providing liquidity to its various pools. The APYs on Aave can be high, with some pools offering over 10% APY.

5. Uniswap (UNI)

Uniswap is a popular DEX built on the Ethereum blockchain. It allows users to trade crypto assets and earn rewards through yield farming. Uniswap offers a variety of yield farming pools, with rewards paid out in its native token, UNI. The APYs on Uniswap can be high, with some pools offering over 5,000% APY.

6. Compound (COMP)

Compound is a DeFi platform that allows users to lend and borrow crypto assets. It also offers yield farming opportunities through its liquidity mining program. Compound rewards users with its native token, COMP, for providing liquidity to its various pools. The APYs on Compound can be high, with some pools offering over 10% APY.

7. Balancer (BAL)

Balancer is a DEX that allows users to trade crypto assets and earn rewards through yield farming. It's built on the Ethereum blockchain and offers a range of yield farming pools, with rewards paid out in its native token, BAL. The APYs on Balancer can be high, with some pools offering over 5,000% APY.

8. Harvest Finance (FARM)

Harvest Finance is a DeFi platform that allows users to earn rewards through yield farming. It offers a range of yield farming pools, with rewards paid out in its native token, FARM.