According to the principle of blockhain, the more transaction that is verified and confirmed, the more secure it will be.
We all know that Bicoin starts several ago and undeniably the most secure platform up to date as long as the principle is concerned but Ethereum has more capabilities than bitcoin and we all know that most of the coins that are emerging is an ERC20 type of coin which uses Ethereum platform.
In your mind, which platform will have more transactions and therefore secure in the future.
Keep in mind that Ethereum starts 3 years ago while Bitcoin starts 9 years ago. Also consider the fact that Ethereum can handle more transaction per second than bitcoin.
Bitcoin is not a platform. Can you tell me what make you call that as a platform? I think about ethereum will be more scalable than bitcoin (It's happened)
Remember another hardcap to the total supply of ethereum will have determined and you will be able to earn passive income from the ethereum network and that gives another positive value to ether compared with bitcoin.