I think it's both easy and hard, depending how you look at it. Hard because it's a tough ML problem where you have to combat overfitting and the messiness of th

I think it's both easy and hard, depending how you look at it. Hard because it's a tough ML problem where you have to combat overfitting and the messiness of the real world; easy because crypto is clearly one of the easiest markets to trade and there are opportunities all over the place (compared to equities for example). On top of my head: stat arb, yield arb, exchange arb, funding arb, market making / liquidity providing (CEX/DEX), doing/preventing sandwich attacks, good old yield farming...