the advantages possessed by EThereum make it even more valuable in the future unless suddenly there are technological rivals (yes who knows)
but for this reason I am sure of the future of ETH.
It's a very small market. Doubt any 'sudden technological rival' will do much. If decentralized applications is a real thing providing real value to real people, ETH will be valuable. If not, it won't. It's not about competition though, IMO.