Etherum is going to be a good long term investment. There are lots of new ico's and tokens utilizing the Etherum smart contract platform which will make it more demanding. It definitely has great potential and large developer team behind it. I am waiting for it to get near $200 to buy more. So definitely a HODL.
You will be crazy to not own any ETH. ETH is the leading technology, which allows for real business applications to be deployed via the blockchain. It's a big deal.