I don't get your logic. Currently we have shit load of altcoins that somehow co-exist and we don't see everyone jumping on one (currently "best") altcoin.
Why do you think it would be different with Ether? Not to mention you can use Ether to create more altcoins.
Edit:
What exactly is ethereum? Is it a crypto currency of its own or a platform for cryptos?
Both?
They co-exist but are rapidly being sold into oblivion. There is no barrier to entry and 100 of coins are being introduced every month. Huge multipools selling for a profit for BTC. My 8 month honeymoon with alts are now over. I'm now licking my wounds and sticking with BTC(asset) and now ETH(platform).. The only two that a feel have a future. I should have stuck with BTC from day one. I would have saved a heck of a lot of my money.