I believe diversification is no bad thing as it increases returns, and exposes one to many opportunities.
I also believe, some diversification could bring opportunities and also a wise step for safe fund from losing together cause it wouldn’t impossible if any top coin downfall from its position
What alternative coin's can one hurdle for 5years ?
Too long to go, where top coins also need to suffer for their existence. Ethereum, Solana, Polygon! I can Only suggest those cause i believe they are potential altcoin, Will expand themself in future. Bnb can be added in that list if you willing to