Such a strategy will bring profit only if the cryptocurrency was chosen correctly for the hold, since most coins simply depreciate over time, which ultimately brings losses instead of profits.
Technically, the only real cryptocurrency is Bitcoin. The rest? Just altcoins and a bunch of shitcoins.
Yes, bitcoin is a time-tested coin that has shown record price growth for investing in such a short period of time since its creation. But among altcoins, there is, in my opinion, the same reliable coin, and this coin is ETH.