Why is Yield Farming really hot right now?

Because of liquidity mining. Liquidity mining supercharges yield farming

All the Cryptocurrencies have observed a rise in the interest due to the high volatility in lots of the standard assets. This also led to the rise of Yield Farming

What’s more, many of the Yield-Harvesting products only debuted this summer, offering highly attractive tokens as rewards and boasting of high-profile backers.