+1 for Monero for sure. I wouldn’t even say its just good for buying drugs like some others suggested.

https://monerica.com/ is made for you to find stuff to buy with monero. You can find almost anything there including phsical wares like clothes, food, and also lots of online services lile hosting providers for example. I even saw an accounting firm there.

Someone made a whole series on how to build a general pupose redstone computer. You can program it to do anything you want with already written programs like a calculator, connect4, a maze generator or even Tetris. https://www.youtube.com/watch?v=hAZEXqWLTmY