The question is very controversial, but if the Finance Exchange dies, then the Binance Smart Chain will die, along with BSD.

But also recently there have been a lot of lawsuits and proceedings about USD (Tether), they say that this is an inflationary token.

What do I think? I think that for the complete disappearance of these coins, you need very strong and bad news for the collapse. Both coins have a huge capitalization and it will be impossible to break them so easily.