Binance exchange doesn't need the US market to survive, they're a global cryptocurrency exchange and their operation aren't limited to just US. They enter the US market through Binance US just as they entered other countries officially through same method. Binance US might cease to exist but Binance global will keep existing an people can still buy and sell their coins with the exchange.

One disadvantage from this whole situation happening is that this could affect Binance exchange reputation and other exchange can take advantage of the situation to announced themselves to the market and this means Binance will have to work their way back to the top.