My brother convinced me to buy a little cryptocurrency. He sank most of his retirement into it - I'm just taking what I would have spent on dining out this year and plopped it in Coinbase. My initial $590 in December is now up to $1,800. It is extremely volatile, it was up to $3000 last week, but is back down today. I think my brother is crazy, but he paid off his mortgage last week and took back all his initial investment, so he is only playing with their $$$ now, so I guess he is doing OK.