I really don’t see that Dabs, like ever. Unless you’re talking about the Idiocracy Era (year 2500+).
Maybe not in our lifetimes, but you never know. I've seen more than a few essays talk about these numbers and hyperbitcoinization. It's going to approach those numbers within the next 100 to 200 years, not all the way to year 2500. Maybe even before year 2140 (the last satoshi mined.)
Again, we'll have 20 million coins already by 2028, and 99.9% mined by 2048 (another 20 years after 2028). So it will start happening between those two years.