Definitely it is,and that is one of the reason why ethereum is on the top of the list when it comes to altcoins. And also the stability of the ethereum is already proven for many years and that is why it is really supported by a lot of people and investors all over the world.
Amongst all the crypto coins which are there, ETH is the only unique coin which can be used as both, long term investment of money as well as short term investment of money. You can do either of both and that this is you who must think over it before making a final decision. I will suggest you go with holding of your coins as this will help you in having more profit at time of pump.