...Some people use their extra money to gamble, club, drink, womanize and many more but it's wise for you not to use this funds for consumption purpose. ..
Investing with your discretionary income allows you to pile up more bitcoin for yourself overtime and hodli till your desired time.
But in any case, you should not limit yourself to entertainment, because living with the sole purpose of accumulating more bitcoins is pointless. You have provided a good list of what you can spend your discretionary income on, do not limit yourself, because life is short)