Tether is held up by hope, a centralized coin controlled by one entity, just like BSv. If anyone changes their bitcoin for either, they deserve what's coming to them. Currently Tether is at #4, I'm expecting tether crashing all the way to #60 would have the same effect on BTC as BSv had when it slipped from #5 coin by market cap to #10 #20 #30 #40 #50 #60