It's not based on numbers, it's more likely based on a rush sensation after a Doritos and Monster binge while he was surfing the Internet.

The figure I have seen the most about Bitcoins lost in various sites is 4 million, which seems to me to be outrageous and although some people question it, it is the most repeated:

How Many Bitcoins Have Been Lost?

That Bitcoins will continue to be lost will be inevitable, what happens is that nowadays and from now on people are much more careful than they were in the early years, where people for example mined Bitcoins, forgot about it and years later when the price had risen a lot they remembered trying to recover them in vain.

On the other hand, the lost ones make the ones we have more valuable by a simple question of supply and demand.