You can buy some DeepOnion, right now DeepOnion price under $5. I think this this coin has a great future in 2018 and it is the best time to buy DeepOnion.
DeepOnion has a lot of red flags. Plenty of better anon coins - XMR, ZEC, ZCL, etc. I personally like that ZCL and BTC will do a merged hardfork to BTCP the end of this month. My bet is that will be the new privacy coin people will get behind.