There is no need to trust Tether. Because Tether itself has hidden his face to reveal his truth and as there is no legit third party to audit. Tether has not posted their audited accounts for several months, they had a contract with an auditing firm called Friedman LLP but was recently terminated for ‘unknown’ reasons.
So, why Tether still exists?
Tether argue that it's value is equal to 1 usd . Basically, it is just a statement but has no proof. USDT is not actually backed by the dollar at all.
So, why people still use Tether?
Mainly, people use Tether to make quick cash to USD of a large amount of Cryptocurrency when the market of cryptocurrency become cashless and the price goes down.
So, Tether is best for making hard cash, not for long-term investment. Because there is no secure reason to hold it.
Bitfinex supporting USDT and using USDT to manipulate the price of cryptocurrencies, especially Bitcoin.
So, just stay away from USDT. There is lots of trusted coins out there.
Thanks.