I think you should hold your Waves. 100 Waves is not a huge money. So I think, hold Waves at least until 2019
Don't know if holding Wves is a good idea, the platform is reliable but it is not that type of a coin that jump up and down at the price
It's good to accumulate a stable platform's coin. Then, when the market wakes up to the fact that Waves is in many ways superior to ethereum, bitcoin, (certainly) ripple and is working established product you will reap the rewards - like the ethereum holders did in 2016.