Yea I have check same think right the altcoins market lot of time goes to down. But if you want a good planning then take holding CMC top 10 currency. Like music you will need some panic heart then of course good profitable waiting for you.
To earn on the top 10 cryptocurrencies you will need a lot of patience and there are also a lot of risks that this top 10 will change in 5 years
i will happily choose the low cost coins/tokens in the market and have the patient to wait.
There are so many solid projects that are just waiting for the big bulls to run.
At top ten i will go BCH, ETH and BTC, though you need big money to earn big here.