You early bite Bitcoin. In the near future will make a number of changes in its code and everything will fly! Bitcoin was, is and will be a long time crypto currency number 1!
I thought the same with you. Bitcoin was , is and will be number one always in future. King of cryptocurrency is bitcoin no other altcoin can change it. All the exchange offer market pair into bitcoin not other altcoin. However if bitcoin will be changed and it will be changed by etherium.
It won't though, I love Ethereum but it has the same problems as Bitcoin, just less pronounced due to it being worth a lot less. If Ethereum was worth 50 grand we'd see the same problems. Maybe even if it was worth as much as Bitcoin is now. It's already expensive at times to move Eth around, and using EtherDelta can gobble through your money fast.
For mass adoption and scalability, Raiblocks would be much better, it's not even a contest, I refer you to the gif posted earlier by christianb35.
http://i.imgur.com/oRpO8lc.gif