There will be some potential coins that we can hold for the future to grow up as well.
1. EOS-> it is like what happened to Ethereum, I think that EOS can be the next ETH with better system and cheaper fee.
2. Other choices probably will be Tron and ADA. Those are what I'm holding and still searching for some others.
3. NEO
4. tether
5. Litecoin
I assume your first picked potential coin is ethereum followed by these mentioned coins. These are belong to the categories of the potential coin which is the healthy project in crypto.