It's personal man, you're the only one who can decide that. If you have great incomes then why not save it for the future. Or split the amount on how much you are able/want to spent or save.
Yes, I agree we shall spend it only for future emergency use. But if we really want to spend it for somehow atleast we shall
Lower down all our important expenses that can't be removed by this we can savemore for other investments.
Saving for the future is a sure thing and should not be missed. But if you have a lot of bitcoin and then you want to spend bitcoin on certain things, that's not a problem and the important thing is that you spend regularly and in accordance with your financial situation and do not be wasteful