My idea is if we hold some coins it should be linked with a good project. Unless it will be useless keep holding for 5 years. If you have no time to analyze what are the  good projects just try to keep holding around first 10 coins on the coinmarketcap. As example if someone hold 1 Eth since 2018 to 2021 it can be got more than 3000$. So the conclusion is you need to invest in a good coin.