eth has proved itself to have good value. it dip to 8$ months ago but look at it now. its $15 each. if you have invested during the time when it dip to $8, you could have almost doubled your investment. ETH and XMR and DASH can be a good alt so long as its being used and has purpose.
The ETH is one of the best altcoins. It has good development team.
Ethereum tokens are not "alt" to Bitcoin.
Assuming Bitcoin dominance could well be your downfall.