If i have 21 bitcoins. I will travel around the world and buy tickets to tomorrowland with my friends.
you are just wasting your bitcoin because if you have that so much money and you dont know where to use it , for me or my suggestion would be better than your idea , just hold it until one day you can use it for some emergency purposes because it will help you 21 bitcoin is so much money or try to reinvest it so that you can earn more than that.
They say you only live once so make the most out of it. So for me it is not that bad if you want to use it for your own pleasure. Plus if you have that kind of amount suddenly without working hard for it then it would really gone fast. Because if you earn big easily then it would be likely you to spend it easily too.