Woah this is such an amazing idea! Now this money that you could have spent on such a bad thing, you're investing in your healthy and bright future. Well done! I hope it works out for you! 
It will really work for him. He's becoming healthy and invested at the right time using his budget buying bitcoin instead of buying cigars.
And with other people who have different activities that can be bad for them or can be spared, they can also apply what op has done.