When I have started learning Crypto, I was reading hodl advice all over the place and adopting. Luckily I have sold Eth despite of that two months ago and avoided a huge crash. I could now buy at least three times more Eth for the same price. And two to three times more btc.
Trading requires lot of time, devotion and concentration. It is a great thing to learn but needs to be played very carefully, and with no greed.
Okay, it is good you got lucky and sold, but from the look of things, you either did not sell because you saw the crash coming or you used some indicators to make those decisions, but you just sold at the peak, got lucky and now you are looking forward to buying more.
However, this is what I want you to understand, you may be lucky now but that does not mean you will get lucky tomorrow. It pays to trade, but you will be in an emotional state and a gambling state, if you are actually doing it without knowledge and strategy.