I am 18 yo, how should I use my (few) money?

I am 18 and have 400 euros (that's all I have). I would like to buy a cryptocurrency with low market cap (I already have in mind what to buy), do you think this figure is too low to get anything good in the future? A month I get pocket money of about € 80/100 and I could invest that too every month. I don't work, I still go to school. Am I just a fool to believe I can do something with so little money? maybe I should spend it on a next gen console or some clothes? I state that I am aware of being able to lose them, what would you do in my place?