Altcoins managed to make a lot of people have money but they also managed to make a lot of people lose a lot of money, I'll give an example of litecoin:

LTC had its ATH at 413$ and the current price is at 62$, I ask:

does anyone really believe that one day the price of litecoin will go back to 413$?

being honest I do not believe that litecoin as well as many altcoins will reach ATH again, when it is said that investing in altcoins is something dangerous people need to listen, imagine who bought at 413$ and today sees 62$, this is a big loss