About BTC pizza day one can also buy BTC and spend it immediatly. That's what I do, if I can and want to pay in BTC I buy some BTC and spend it, if I want to buy some BTC to HODL I just buy and HODL. There are two different things. Maybe in a few years, if and when 1 BTC will be worth more than 100k$ (one can dream :-) ) I will spend my hodlings, but for now I just stick to buy and hodl OR buy and spend.