Tether has been the target of a lot of FUD due to its murky balance sheet and lack of a public audit. The company has repeatedly been fined for misleading statements around the state of its books. After Tether released a first breakdown of its balances, it came under even more scrutiny from regulators over its claims that all issued stablecoins are fully backed by dollar reserves.
Even though a report supposedly cleared Tether from any allegations of wrongdoing, doubts remain. The company has been in repeated spats over its business practices, but most in crypto accept that Tether is, in a way, "too big too fail."