I suspect ETH will win as a backbone long term, or something else we havent seen yet properly (tangle etc) Until then though there are trading opportunities.
Ethereum will soon overtake Bitcoin in terms of market cap (this was always going to happen as it's a cracking blockchain with so many great features e.g. smart contracts)... Last week alone ETH was eating into it achieving 22% whilst BTC was sitting at 32% - Due to the ETH pairings and shear demand of it during most ICO's it should remain one of the most stable coins in the market. Over the coming the months you'll start to notice more and more coins staying in the green whilst bitcoin goes through dips..
My opinion on Bitcoin moving forward is that is will become the most valuable crypto currency in the world in terms of value 'per coin' (not that of market cap). It definitely won't be the most used coin as that will be a future coin which will be deployed by banks across a separate blockchain.
Bitcoin in my eyes is much like that of the .com - As in, most people deem .com as the king of the online space and give it a greater value, whereas i see bitcoin as the king of the crypto space as everything after bitcoin is simply an altcoin - That doesn't mean I don't like the other coins as they all have a purpose and value, just like that of other domain extensions like .co.uk, .org and so on..
It's a great time to be part of the crypto / blockchain / smart contracts sector as we're right at the beginning of something pretty special and disruptive! You're always going to have skeptics out there and people who want to see things fail, just like the early days of the internet when people kept saying it would never take off or domain names had no value etc (ooh how wrong they were)...
Bitcoin is not the most elegant or efficient of cryptos / blockchains, and in all honesty it’s pretty much broken in terms of a payment network in its current form compared to that of other blockchains, however, it’s clearly something that a large number of people around the world want regardless of the crazy values people put on it.. So for that reason Bitcoin will succeed and overcome andy current issues with scaling and transaction speeds, and when it does those who sat tight and weathered the storm or invested in the dips will be rewarded I'm sure.
Btw... There are so many great projects out there using alternative coins which are truly going to shape the future of businesses and how we trade / communicate - I'd highly recommend for people not to just focus on bitcoin otherwise you'll seriously miss the boat!