This is not investing. I did not ever hold significant amounts of cryptocurrency. People would ask me to sell them crypto and then I’d buy it on a crypto exchange and then sell it to them.

I do not believe holding cryptocurrency qualifies as “investing”. It is much closer to gambling as the entire valuation is purely speculative. I get that all investing is gambling to some extent, but it’s not the same as stocks, for example, because holding stocks gives you voting rights for a company’s board of directors and entitles you to a portion of the company’s profits in the form of dividends.