You’re right, trust is the biggest issue with stablecoins. Even if some prove their reserves, many people still worry. It’s normal to be cautious since money feels “out of thin air,” but transparency helps build confidence slowly.
This hinges on their integrity and transparency, as they maintain a high level of audit transparency. In this regard, USDC provides the most detailed audit results based on US auditing standards (known to be the most stringent). USDT also has past "sins" that have undermined public trust, although they're working to improve.