SpectreCoin (XSPEC). It's got a low market cap, is undervalued compared to other privacy coins (less than $2), and 2018 is going to be the year of privacy coins (as McAfee has stated, and I agree with). It has solid technology behind it and its development team is continually improving upon that technolgy. You want 2-3x returns? XSPEC can do that for you as the marketplace becomes more aware of the coin and the development team continues to output solid high quality technology.