I've been looking at 0x Protocol Exchange, which trades as ZRX.
Yes, this is speculation, but the more research I've done, the more blue sky I see in the upcoming years for this coin. ZRX is positioned to become the trading standard for ERC20 tokens. It has the most flexible approach and caters to a wide range of applications. By 2020, there will be separate order books for traditional assets, which is a trillion dollar market, which will inevitably be ERC20 tokenized.
At the time of this post, ZRX is trading around 0.76 USD, and is up 370% over the last month.
Realistically, I can see ZRX approaching $3.50 to $4 by the end of 2018.
Of course, this is all just speculation.
The price right now is actually very close to a dollar. A $4 prediction for this year is very reasonable. I honestly think it can go quite a bit higher than that. The 0xproject team is made up of very talented individuals. One of the advisors is also the Co-founder of Coinbase. If ZRX makes it on Coinbase, it will easily be $10 or higher.