Use it for productive things.
-Speculate in crypto. Speculation helps stabilize prices, crypto NEEDS more speculators. You could earn more money for making the currency more useful and reliable for others.
-Buy some modafinil. It keeps you woke af so you can concentrate in anything you need to do (learning a new skill, etc). It is one of the best smartdrugs there is and unlike Adderall it isn't really addictive (it's not a stimulant, they work very differently).
https://www.afinilexpress.com/ 
