The best method would be to reduce your access to your bankroll IMO and keeping the coins secure in the same time, keeping private keys in vaults in banks or secure locations would be the best IMO.
yes actually if you have no idea to manage your bitcoin then it is better to stay away to touch the bitcoin that you have , sometimes gambling turn to something horrible causing you out of control in spending money.
no money then no gamble , as times goes by it may makes you forget it all.
Yep don't ever touch your bankroll if you don't want to lose them all. It is not just happening occasionally that gambling turns to something horrible but it happens very often when you are this type of gambler that don't know when to quit or stop. But if you are responsible one and you manage to learn from all your mistakes, you will realize that anything you can do just to quit gambling.