I think everything is possible, now with 1 wallet etherium we could save a lot of altcoin and of course dev. etherium would do the best strategy to be number 1.
Yes, everything is possible. Depends only on users, because crypto currency depends only on their activity.
ETH and waves are in demand now,they does provide development and tries to make a way to line with bitcoin. Those two were currently used in Encryptotel.