Im on the newer side to crypto, just want to say that first.
Tether always stays between .99 and 1.01. How, I dont know. With it never really changing in price, why not convert your cryptos to tether to avoid losses when the market is crashing?
In those exchanges where there is no option for USD trading we can opt for the tether but in those exchanges where we can trade in USD we can put our money to USD when market is crashing. For example when I started my trade in bittrex then I was using tether for my parking of my capital which was for trading as at that time there was not any USD for the trade but now they added USD now I can easily put them in USD when I feel it to do.