this is a good strategy for those who don't want to do or monitor the market on a daily basis, they will buy then forget about it in a few years then reap the rewards, but not suitable for high risk altcoins, and it is recommended to buy low risk coins, maybe top 10 better marketcap.
Which top 10 is better?
that's also not a guarantee, you have to remember that LUNA was also in the Top 10 and in the end Rugpull and everyone lost. For the long term the safest is only Bitcoin, if you don't want to bother doing more research. But if you still want to choose altcoins as a long-term backup investment, Ethereum and BNB can be a good suggestion (but at your own risk). The long term strategy is suitable for everyone, and not having to stare at the screen all the time to monitor the price. Simply buy and hold until the target price is reached. quite easy.