For me, Long term investment is the best way to earn a huge amount of profit. You just have to buy your trusted coins at the low price and wait for the increase. As long as you dont panic on the changes of the market, all will be safe. Just believe on your investments, for sure, youll gain big profit.
It was the best way of earning, but now rules are changed and many coins get scammed during last year, delisted from exchanges and other bad things, you need to choose stable coins.