1) HOLD - Buy currency like BTC/ETH/SOL/BNB and hold for long term
This is the best way that I do also for crypto investment, especially for long term period. It's just that, at that time, I missed SOL, for other coins, I am very grateful to have them since the price was still small. And it teaches me very well to prepare for the next bearish period.
Well, we don't know which coins will pump up significantly early on. I mean nobody expected BNB to have a significant increase in price after they launched Binance Smart Chain, and only those who trusted the project right before they launched it are the ones that gained huge money. Same with SOL. If you trust the project and held to it, you will be rewarded and vice versa.
In the next years, there will be other altcoins that will pump quite significantly the same as BNB and SOL. The question is what coin? As for the strategy though, that's what I'm doing for a long time already and aside from that, I'm trading as well. I guess buying just random coins at the top at a very low price would be a good strategy and pray that it will go up in price in the upcoming years.