A good bit of my money is on SpectreCoin.

XSPEC has cutting edge privacy technology, the development team is improving upon the privacy of the coin feverishly, and the price is very, very low compared to other privacy coins. At its current rate XSPEC could give you some huge returns in 2018. If you're interested in learning more about the coin then you can check out the CoinWiki (the URL is in my signature), or the project's Slack channel. If you can read code, then you can check out the project's GitHub, too.