promissing privacy coin/projects for me are:

Spectrecoin (XSPEC), they successfully integrated TOR and OBFS4 and will offer stealtstaking. They were the first, and only one to my knowledge, to successfully penetrate the great firewall of china. And all on a very low budget. They lack the funding for a full on marketing campaign atm so get it whil you can. It can surely get back to their all time high wigh would be an easy 4x to 5x on your investment now, but imo it can go much higher since it is still in development and has some awesome devs behind it.

I also have a small bag of LUXCORE (LUX) from before J. McAfee came on board. They are doing some interesting things with their webwallet. And you can love or hate McAfee he does have the knowhow both technical of business.