yes, it's definitely one of the best investments you can make right now. You don't even have to trust me, just look at the numbers and you'll see that ETH is the second biggest Altcoins after BTC, and there is a good reason for that. The Ethereum network wants to establish a marketplace where everyone will be able to develop their own decentralized apps, which a lot of people are already doing, in that way, in order to run your application, you'll have to use Ethereum and it's gas unit which derives from ETH. Anyone in the future who will want to use one of these apps will have to buy ETH in order to pay for that gas, and that means that people will all of the sudden start buying that ETH, which will eventually increase the overal price and will increase your portfolio (if you're holding ETH).