I expect they will continue to get obscenely wealthy off interest payments on their US Treasuries; Others have forecasted for many years that they will collapse to zero.
noone knows, but the real question is why any govt hasnt done any significative investigation or attack on tether? the only explanation i see (from the US pov) is that they actually collaborating in deeper investigations so they let it coexist, otherwise it makes no sense how legitimated it is knowing that it's pure fake money and it's not backed up at all