This doesn't necessarily mean you're invalid, but if BTC increased 100x, they'd exceed the world's GDP. So... yeah, though maybe you can't say that's impossible, if by some miracle BTC became the dominant currency in a (much richer) future.
Ahh, but the asteroid 16 Psyche is worth $10 quintillion and one day we'll mine it. That lets the BTC cap go 100,000x further than the world GDP.
[On a more serious note, note that GDPs have a time component and market caps -- or the amount of a currency in circulation -- don't. If each unit of money gets spent every month, you only need GDP/12 units of money in circulation; if each unit of money gets spent every 10 years, you need GDPx10 units of money.]