many altcoins have the potential to increase in the future such as Ethereum. however there are some altcoins that have smart contracts that have better potential in my opinion are:
- Polygon
- Solona
- Stellar
- Bnb
- Tron
This is the list of the best altcoins in my opinion for now and I'm sure it will continue to improve in the future.
What you are saying is not wrong, but you should also know that they will not be able to overtake Ethereum because BNB and Polygon were basically built on Ethereum smart contracts in the past before they both had their own smart contracts as they are now.