No matter how good you are or you are a gambling expert, the time will come when you will face defeat. So you should always be prepared for whatever possible consequences we should really expect.
The fact that you call yourself expert, it's assume that you are smart and matured enough to prepare not only for the winning moment but also on the worst experience when gambling.
It is very important that you know the limit or to what extent you should gamble because your money is not unlimited unless you are a millionaire. Even a millionaire can be bankrupt if he doesn't manage his money well.
That's what you do when you are gambling responsibly, gamblers that are professional are treating gambling as a business, they always do the planning, initiate the plan and they have to follow the fun all through out, they never get out and just be stupid follow that weak emotion to dictate their future.