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.
In this case, still, I can't guarantee the actual one that will pack up next, but one thing that is sure is that m!xers by virtual of their mode of operation, will always run into trouble. There is no way more illegal dealings will not be added to their operations whether they know of it or not.
Come to think of it, m!xers can't be good for our society, a service that makes transactions untreatable, does one think that evildoers will not happen to use that service often? Also, do not forget that some of those evildoers will knowingly set up their mixing service to hide under it and deliberately move their illicit funds, that's even as they also make more money from its direct service.