Simple question, difficult answer.
Many mixers are active on Bitcointalk but how long will each one last?
Seems to be just a matter of time until we'll have our next mixer shutdown.
Pick your one, which is next!
Did you mean we should pick only from those ones active here?
Any centralized mixer is allowed to pick. No matter if it's from Bitcointalk or not.
No one can tell which crypto mixer will be next to shut down since the cryptocurrency tumbler is acknowledged by FinCen and the only crypto mixer that deals with the mixing of dirty/bad fund are shut down.
In the future to prevent crypto mixers from troubling the authority they will increase the time to do some background checks on their customer. I'm saying this due to how abusive leads to KYC in crypto casinos.