Bitcoin

Well just look at it this way:
1. you still need Bitcoins to buy most of other crypto currencies.
2. also, most ATMs out there only support Bitcoin and no other coin
3. all the banks and other financial institutions are mostly looking at using bitcoin, not other coins

All these facts speak in Bitcoins favor and that is also what is driving the value up.
So I'd say that in the next 3-5 years Bitcoin will be still king.

If they manage to speed up the transactions and lower the cost of confirming transactions there is a good chance that BTC will be the winner of the crypto-race.