Tether's page (https://wallet.tether.to/transparency) claims $23.6 billion in total assets. Despite their claims to transparency, I see no report of what those assets are, how risky those assets are, or any audit that assets they even own those assets. Their front page has a big link saying "Proof of funds", which leads to an audit published 2½ years ago, claiming only $2.5 billion in cash in two bank accounts with unnamed banks.
For a company that claims to be "always fully transparent," that is shockingly opaque.