There are no criminal charges involving Coinbase or Kraken. Litigation by SEC yes, criminal charges no. There’s a very meaningful difference there. The first type can ruin your business, the second put you behind bars too.
Traditional banks aren't trying to prove that people should trust them. People already trust them, and even if they don't, they're already regulated enough that consumers know the government will step in to bail them out.
So you tell me someone has 88bn us dollar or real assets somewhere stored away safely?
Somehow I doubt that. That would mean someone invested this in a save and independent way with enough return to keep it inflation save and apparently has no other idea on how to invest that even more magical.
Most people can't redeem USDT from Tether... Read their terms. You can only redeem USDT for USD if you bought directly from them, and even then it needs to be more than $100k. If you fulfill those two requirements, they'll let you redeem if they want to. They state in their terms that redemption is entirely at their discretion, and they can just say no if they gambled the reserves away.