Spectrecoin/Xspec is definitely worth a glance. It's one of the few privacy coin's out there that offers a wholistic approach to privacy. It had great development during the bear market and is currently in the top 100 for github commits. I'm a fan of this coin and investor as I think Privacy coins will be the top gainers for 2020. Heres an article that dives into the tech behind Spectrecoin and explains why it's unique in the space. https://www.publish0x.com/spectrecoin-fans/peacocking-age-of-privacy-why-ive-chosen-spectrecoin-xqojmv