Any one coin is likely to become a great LONG-TERM investment. You should see the cryptocurrency growing. The market two years ago is now completely different from the current market. If you bought any coin holding two years ago, It is now a great LONG-TERM investment.
I agree that a lot of coins from existing ones are a good long-term investment. But I do not agree with the fact that the situation is the same as two years ago, everything has changed very much. At the moment, the market has grown very much and new qualitative changes are required to grow further.