The exact numbers or precision of the future is uncertain. But that's the general direction of what bitcoin will be, or what I think it will be. It's possible I am off by a few decades and I won't live to see $100M in my lifetime.

I've read more than one article on how they came up with that number, and if I remember correctly it's because of at least a couple of things:

1. Nothing will kill bitcoin. The internet has to die first. Or rather the extinction of the human race.
2. Loss of freedom and communication due to worldwide coordinated totalitarianism. Improbable. Or dare I say impossible.

It's like saying that email is dead. Or you can't download torrents.

When Bitcoin will eventually become the world reserve currency and ultimate near-perfect store of value, divided by the maximum supply of Bitcoin, we arrive at a value between 50M to 100M.