It depends on when you got into the crypto market. If you got into BTC, ETH, LTC, and a few other prominent ones (Dash, Monero, ...) for a while, you should continue to sit on them because their prices will continue to rise. However, if you want to get insane returns, hunt for undervalued coins and plunk down no more than $5,000 and spread your investments across 20-30 coins.