Updated odds for the dominant cryptocurrency in 2018:
Ethereum: 70%
Litecoin: 15%
Bitcoin: 15%
bitcoin transaction fees are likely to reach 50$, by the end of the year, which reasults in people trading in ethereum and not bitcoin. today, a single transaction can cost about 35$, which defeats the whole purpose of trading with crypo-currencies. Bitcoin is a broken, unusable, unaffordable network, a nd people are leaving it in droves.
What has Bitcoin done about this problem, besides wasting two years while other coins prepared to dominate? One side wants to create a user-activated-soft-fork, an insidious client that amounts to an attack on the network because of how it is designed. Rather than simply forking off from the main chain and permanently severing the two chains to implement Segregated Witness, user-activated-soft-fork supporters have written their code so that it is possible that their chain could, at any time in the indefinite future, completely revert all transactions sent since August 1. It's that bad. But don't do anything just yet, bitcoin is expected to increase largly as australia are going to accept it on the first of july, but once that wave calms down, ethereum is expected to rise even more, and be the future of the crypto-currencies. lite coin is also expected to rise because of it being a lot more affordable and because of its stableness.
for more infomation I recommend you check out this blog: https://forums.prohashing.com/viewtopic.php?f=11&t=1541