How is this data calculated? Is this the global stock market or limited to the US? If this is global data I can see people twist the narrative that the stock market is open 24/7 too.

Anyway, it's not hard to see that in the internet era, the Bitcoin market is always open due to the reasons above. I think it's more interesting if we collect data when the Bitcoin network is down compared to traditional payment services like banks. I bet the result is better to convince people that Bitcoin is the better choice if they're looking for a censorship-resistant payment network. CMIIW.