Binance stock brokerage

As i know, there's stock brokerage perform

it's not huge yet but exist now.

so my query is, we will purchase a stock with secure coin. and the stock may be storage in custodial institution in US, with binance identify

Is there any danger of dubai purchase institution?

I like binance however, if binance out of enterprise,

Can I take inventory shares back?

or transfer to a different brokerage/exchanges?