It is the second largest coin so it is always a good idea to hold some ETH, actually you have no other choice if you want to interact with DeFi or NFT nowadays. It is the flagship of smart contract cryptos. Smart contracts are the most important feature of ETH and great innovation to the whole industry. I think that ETH has huge potential but right now it is clogged and it is fighting with its own popularity. On the one hand it is great for project to have such attention but it generates also troubles such as slow transactions for very high fees. The whole community is looking forward for ETH 2.0 - PoS and sharding, but I would not be so optimistic as this is the long way to have it. Right now ETH spawned the developers all around the space to introduce competition to ETH.
The potential of Ethereum as the largest and most profound of the crypto with smart contracts is huge and it could lead to the whole metaverse with so many applications.