I am not a fan of drug dealers but I would never use an encryption scheme that is in the hand of a single entity. Open source systems and fully distributed peer to peer systems (a la tor or bitcoin) are best for me.
I use pgp whenever I can. It is not easy to use and I think it is not widely available because some entities are putting the brakes on a general acceptance. That alone is a good reason to trust it. The problem is always in the implementation and the underlying support structure. The more sensitive your needs are, the more investigation you need to put into these underlying support structure.
BTW, if I was an Encrochat associate, I would lay low for a while… hehe!
“Police monitored a hundred million encrypted messages sent through Encrochat, a network used by career criminals to discuss drug deals, murders, and extortion plots.”
www.vice.com/en_us/article/3aza95/how-police-took-over-encrochat-hacked