I'd assume that the whole market will crash after Tether goes to $0. That's because Tether is the one stablecoin which moves the market. Ever since the stablecoin launched, the issuer (Bitfinex) has been "printing" new coins with the aim to manipulate the market. Without Tether, the market will be doomed. Prices of major crypto assets will recover after that, albeit at a slow and steady pace. There's no need to worry about Tether since there are a wide number of options to choose from. With a decentralized stablecoin like DAI, there's no need to rely on centralized stablecoins anymore. Time will tell us whenever Tether will survive or become a failed experiment.
Contrary to popular belief, tether is not the thing that keeps bitcoin alive, just the opposite it is the thing that keeps it low. When tether crashes to zero, where does that money go to? Will it go to dollar directly? It will go to bitcoin, people who sell their tether will cause it to go down, because without people selling USDT then how could it go down?
If people are selling for it to go down, then what are they getting in return? If they are selling that means they need to get something in return, even if they are selling it for 10 cents they need to get something in return, and that is 99.99% of the time will be bitcoin, hence the price of bitcoin will skyrocket insanely high, think about 50+ billion dollars worth of bitcoin bought at the same period, even if it is just 5-6 billion dollars that is going to impact the price amazingly well.
