I think you need to read about the project first and understand for yourself if the project looks feasible.
Most of the privacy coins are undervalued right now.
The best opportunity is to find a privacy-related project with a low total supply (less than 100M), that way the price will be increasing much faster.
I recently found one project called
Etherem Meta. It is related to anonymity and untraceable transaction. They have a very interesting project to build the Anonymous E-Market Place.
They have Pre ICO right now, you can check their website:
http://ethermeta.com/ Or even better go through their Bitcointalk thread:
https://bitcointalk.org/index.php?topic=2659058.0It is better to be onboard of the racket before it launches to the Moon!