A safe Broker for profitable traders?

I'm making consistent profit and feel like I have things figured out. Now I'm scared of the brokers, how much can I profit before something happens?

What if eventually the sum is too high to withdraw and I get scammed?

Is there a broker/brokers that we can say for sure will let us withdraw any amount of money we own?

You have nothing to worry about, if your broker is registered under the regulatory bodies. For the US, there are two regulatory bodies [CFTC] The Commodity and Futures Trading Commission, and [NFA] National Futures Association