That's true but when the discretionary income is low and not be able to meet up with the bills of entertainment and bitcoin investment , you will have to choose which one is more important, because for me I would rather choose invedt first, then if their is anything left then entertainment can come second.
Life is very short no doubt and everything needs to be balanced but when it is impossible to afford everything at a time just go for what you really need, the rest can come up later.
It all depends on the amount the person has on the discretionary because sometimes we usually think that satisfying our investment first regardless of what is remaining on discretionary income is the best but what if we did not do it right? Or isn't what we are supposed to in having less of discretionary income and still investing from it because after that what if the amount that would be remaining can barely stay for a week without exhaustion because every discretionary should be for months and not even for three weeks because buying an important things is resistable even when you have bought all the things you feel is needed.