It will probably not exist forever, but I certainly agree with you that putting a cap on Bitcoin's price is most likely wrong. I'm more or less sold to the argument that if fiat can go down in purchasing power for years and decades and centuries, and gold growing more valuable for not only centuries but millennia, it is also possible for Bitcoin to go on appreciating for as long as it's relevant.

Unlike fiat and gold whose supplies inflate continuously, Bitcoin's has an end. And if Bitcoin remains relevant a hundred years from now, its value in fiat must already be staggering.