Tether is starting to look like a Madoff-scale Ponzi scam. What maintains the $1 price of Tether is a continual net inflow of cash. Tether is known not to be backed with sufficient real assets.[1] If there's a period of net outflow from Tether, the whole house of cards comes crashing down.
[1] https://www.marketwatch.com/story/tether-reverses-claim-of-1...