Please advise me which coins best for day trading, currently, I use this coins XRP, Ravencoin (RVN) and (Cardano (ADA). I am using low price coins because I have only 2000 USD
There is no determining factor as to how to choose the best coins for trading. Everyday it changes based on their trading volumes. You just need to figure out then and there and choose the best coin to trade with.
I would not recommend trading XRP as it isn't crypto in it's true sense.