His post on Bitcoin from 2013 is pretty funny: https://www.quora.com/q/kyvdkhixnlhvdjdp/There-Are-1-3-Billi...
I mean ... faulty reasoning or not: Bitcoin is currently at $10,240.
Of course I guessed he didn't believe his own reasoning, as when the article was written in November 2013 Bitcoin was $600 and he could have tenfold and more his own money.
Anyway, the point is, it is a coincidence, nothing more.
Had he given a number above $20k he would't have been right at any point in time. And bitcoin might have never hit $10k, which would also left him being wrong.