I am big time follower of ethereum from initial days i was holding ethereum even the price less than 100$ and also i was holding ethereum at the price of 1500$ . But based on recent development i am highly speculative ethereum price after 2.0 release . Once POS introduced the problem of scalability will be solved Maximum supply will be fixed . So i am slowly investing on ethereum from my savings part by part reasons are below
1) Inflation in global curreny or fiat curreny ( ehtereum and bitcoin is best alternative invetment solution )
2) Ethereum is the best Smart contract creation platform holding major DAPP's in market
3) Real world use case
Indeed the crypto space has come to stay and as such have a big role to play in every aspect of human endeavours, however talking about the future of the crypto space, not all coins will be part of it and as the case may be, Ethereum is one of few that will play a vital role in the progression of the crypto space. Thus in my own opinion, your number 2 point is very valid and as such it has placed Ethereum higher than a huge number of coins. Therefore yes, Ethereum is one of such coins that is worth holding because it has a lot to offer in the future.