I have invested a lot in Ethereum, i have more than 60% of my funds in that altcoin, i really trust in their project, and it worked well, i am glad that i bought some ethereum at $170 each one, also i bought more when it droped to $230 last week. I think that Ethereum is going to be the number #2 forever, until another coin takes it place, but i dont think it is going to happen soon.
I doubt that as well, it's too established and it works great, plus it's backed by a lot of big companies