You can fund your sport bet account with bitcoin if the betting provider includes that option as a funding option for your account, but if you are not disciplined as you know yourself well, try not get too conversant with this and stick to regular funding via your local currency as you can directly put the bitcoins you are wanting to hodl at risk of being tamparerd with constantly by you in a bid to fund your betting account.
It only requires discipline. Who that would touch his bitcoin which he supposed to be holding would also touch his fiat that he is saving. Assuming I have fiat, I can easily convert it to bitcoin and send the bitcoin to the casino site I am using.
What is required is discipline while gambling and this what you are talking about is more related to gambling responsibly and not to be addicted.
Only what I see about bitcoin is that its price is volatile but that should not be an issue in a time like this when there has been so much bear market, only bull market is what we are expecting, anyone that gamble now and hold the coin would profit more during bull market. Provided if the coin is not lost during gambling.