Which mint to trust is the same as “trusting” which Bitcoin hot wallet or hardware to use—assuming you’re a regular pleb who isn’t versed enough to verify open-source code or hardware. It’s a mix of rating, recommendations, and trust built on proof of work. I really like Minibits and Coinos Mint, and that’s what I recommend. Calle has this project where it would use donation sats to move money between mints to constantly probe their liquidity.