If Binance as an exchange shuts down? Very bad outcome. All you have to do is study the outcome of previous hacks/shutdowns of what used to be the largest crypto exchanges at the time.
If Binance collapses as in Binance Coin or the BNB chain? It’ll probably be the most massive crypto burst and cold winter in history. There’s no other way around it. There are currently thousands of alts sustained by BNB. It’d likely have the same effect as ETH collapsing and bringing its entire chain filled with shitcoins down with it. It’d be a terrifyingly massive arrow to crypto’s back.
Of course, Bitcoin will do well. But probably only years after the collapse.