I invested about $ 5,000 in January and now I regret it. It was necessary to wait a little and buy everything cheaper
Actually you never know what happens in the crypto market after an hour. This is the reason you regret but do not. Since you own the coins now, better make your mind for the long term investment and do not cash the coins. Add further weight to your portfolio by investing in ETH and Bitcoin.
In long run, probably a year from now, it will pay off in at geometric rate. About the $20k, I would suggest to invest part of it in bonds with minimum default risk and the rest in Bitcoin and ETH.