Why reality is disregarded here ?
Because some countries are tiny and don't have a pot to piss in. That's made up for by the giant ones with economies that could dwarf the puny ones thousands of times over.
I'm constantly amazed at the disconnect certain people have with figures relating to 'real world' turnovers in the finance arena. Forex turns over more than $5 trillion every single day.
$82 million a day is not to be sniffed at. It's still chump change, even more so when you consider that there would be potential demand in every single country in the world if Bitcoin actually grew properly.
Most people can't even do math with small numbers, and completely fail to understand or comprehend large numbers. There was a book that was made into a movie about evolution, where a homo sapien girl was abandoned or something, and got adopted into a neanderthal tribe. The smartest one in the tribe, the chief, could only count up to 5, because that's the number of fingers he has on his hand. The girl was able to count up to 10, which really amazed the chief.
Now obviously there's a lot of fiction in that story, but I think the point can be applied here. Most people are too dumb to comprehend large numbers.
You give the example of $5 trillion vs 82 million, but I doubt these people would understand the difference in magnitude of those numbers. In their mind, its "big number" vs "another big number".