Your money in the bank is just a number that shows the amount of balance you have saved, it is your money, but it is not entirely yours because the bank has access to manage the money. If you keep it in a small amount to make it easier to make buying and selling transactions, you may still be able to bear the risk if something happens to your bank account, such as a break-in or your account is suddenly closed. Make your bank account a temporary transit place when you make a withdrawal from the Exchange, after that you manage the money yourself to avoid any risks that may occur.