Most market participants look at these positions as being unbalanced and while bet against bets like these as they are showing their trade. Other participants can bet against them and try to force a squeeze although that amount of collateral could hold a good amount of increase but other shorts may not be a blue to due to which increases the possibility to squeeze the short. I also checked the Tether address on Bitfinex and it does not match (see below) but it was an exchange address generated on demand.