Tether is "USD-ramp-as-a-service". In the crypto world, there are many anonymously operated exchanges, with no fiat-money banking relationships. Those exchanges tend to offer features that a lot of traders want, like providing a market for any arbitrary token (regulated exchanges tend to be slower with token listings, due to always pondering if something is a security). And yes, if your money is tainted (whether it's…
i wouldnt trust a benevolent (offshore) dictator with my money but if it suits your needs, go ahead
For people dealing with all the anonymously operated, no-KYC exchanges, Tether in your address is far safer than whatever balances you have on those exchanges.
The 'dark' economy is huge, and a lot of capital live in fear of seizure. It shouldn't be a surprise how big Tether's market cap is.
It's basically "USD-ramp-as-a-service", with the only fee being Tether doesn't pay interest, so obviously the operators get whatever interest there is on the float. And this service is VERY valuable, whether you are launching an exchange in a jurisdiction that prevents exchanges (e.g. China), or want to bring about traditionally regulated financial instruments (e.g. derivative swaps) into a relatively unregulated field.