Fedimints have total custody of your coins, they can inflate the "in mint" supply or just outright rug pull you. It's still better from one party having total custody (like coinbase or whatever), but it's still a trusted relationship.
Discussion
>outright rug pull you
As in, steal your coins?
I don't see how they would be able to do that. That's not how Chaumian ecash works. You have the coins physically in your possession. It's not an account based system like blockchain.
No, to participate in a fedimint you have to deposit coins into it, which the multisig quorum then controls. Inside the fedimint is where chaumian ecash comes into play.