you yourself have missed the hidden diamond, the token of the exchange itself, the binance coin (BNB).
If the exchange is closed, will be coin worth anything?
you mean to say binance exchange will be closed !
if this happens then not only BNB , most of coins will dip in worst way .
entire crypto market will see a big dip .
just imagine if a hack rumor of binance can dip market by 10-15% then what a shut down of binance can do .
bcoz it is in top 3 on basis of volume .