It's true that Pizza Day does have a bit of an odd history. While it's fun to celebrate, as you mentioned - the real issue is trading a significant amount on pizzas, which shows how little adoption there was at the time many most people didn't see Bitcoins or Digital currencies as investors/traders see them now. At the end of the day, that's why Bitcoin and cryptocurrencies in general try to reconcile themselves with past bitcoin millionaire hindsight; they realize their expensive decisions should've ended-up just "HODL-ing" instead! Nothing wrong with buying pizza back then (other than costing some BTCs!), however, given some amazing success stories making millions for those 'hands-off' investors,HODL Day could be more appealing for long term capitalization which ensures crypto investments remain ethically protected over time!