One of the most popular altcoin that has given a very huge return on investment this year is the YFI tokens which is presently trading at about $33,000. The token was listed at about $900, and within a period of less than 2 months, the token increased substantially and as its stands the value is not done increasing.

Not a bad project, but when it comes to young privacy coins I prefer looking into the project which has strong dev team with a strong crypto background such as Ryocurrency(RYO), which has useable feature and use case that makes it better than other privacy coins, they have worked deep on Cryptonote protocol and fixed all the flaws while monero a 6-year-old project still fails to fix those flaws.
Why I think new projects like RYO are good because they are better in tech as compare to the old coins and their concept and vision towards mass adoption have worth to look in the long-term.