If I had 21 BTC I would place it on low 
I would obviously lose, but if I didn't lose then I would start buying old collectibles off ebay and amazon and sell for profit.
i would just hold it in my opinion it is dumb to gamble that much money because it can buy you something cool I would obviously lose, but if I didn't lose then I would start buying old collectibles off ebay and amazon and sell for profit.