Bitcoins inception was on the heels of the 2008 financial crisis. The genesis block mentions it. What bitcoin enthusiasts don't trust are objectively untrustworthy institutions. That's it. It's real straight forward.
The users who out of practical concern are considering between trusting Citibank and Bitfinex, will benefit from chosing the one that's regulated.
They don’t take Bitcoin and in any sensible sovereign nation never will.