I'm really far from impressed when it comes to Ethereum. The sole reason why Ethereum is valued at 'a new all time high' is thanks to bitcoin. As a matter of fact Ethereum (atleast the ETH/BTC pair has been in a bear market for the last 6 months. If ethereum kept it's bitcoin value of 0.15 in June of this year (the actual all time high, it's worth 0.038 btc now) ethereum would have a value of nearly 2700$.
Altcoin fans are generally very happy about their recent gains and think that soon the time will come when they will flip "outdated" Bitcoin, but simply switching to ALT/BTC charts on coinmarketcap shows that most altcoins are performing negatively in long term. This means that they are pretty bad at being store of value, because you can just hodl Bitcoin instead and it would very likely to return more profits, be less volatile than alts, not have any critical bugs and not suffer from huge attacks. It's also the most decentralized coin, because alts have less nodes, less developers and some of them are not even cryptocurrencies (looking at you, IOTA).