so i wam just woundering what if i get on the stock market and some airline takes contol ov my airline does my account get locked and i can do anything what happends? thanks all 
They can only take over your airline IF you sell your stocks and they get in hold of the majority share of the stocks.
In case this happens, then you will of course lose the control over that airline. But you still have your money in your holding (either through dividend earnings or the earnings from stock sells). You can then start up a new airline with the money left in your holding. Otherwise you could try to buy your airline back. But there will NEVER be any lock on your account!
(Except on running out of credits)