Although, you can buy ETFs that aim to track cryptocurrencies by buying a basket of them, looking at payment processors, etc.

It's like, I think that lithium is gonna be short in the near future. It's really useful stuff. But I'm not buying kilograms of raw lithium to hoard in my garage, I'm investing in the companies that oversee the element's mining, processing, surveying, etc. And maybe looking at commodity options in the short term, but given what happened there with aluminum...