Daytrading Crypto is almost equal to gambling. You need a lot of luck to sell your assets on a profit and then purchase them again on a lower price. There are cryptocurrencies that are subject to Pump and Dump but you'll never know when that will stop and you'll be at a loss.
Recently, a lot of FOMO and FUD hit the markets and that was a great opportunity for daytraders, but you can't predict IF and WHEN will that happen.
In addition, here's a video by one of the most experienced crypto investors