A bug is discovered allowing fraudulent creation of bitcoins, and no easy or timely fix is possible.
That or governments outlaw it entirely.
That or governments outlaw it entirely.
Consider, what happens if the Internet dies? Well you could run a private coin on an old laptop, but that's not really meaningful.
By analogy: two decades ago, US consumers were buying almost a billion dollars' worth of photographic film a year [1]. Photography hasn't gone anywhere -- people are taking orders of magnitude more photos than they used to -- but if you had invested your entire net worth into Kodak in 2000, you'd be penniless now.
Is this a serious argument?
Also, the concept of "numbers yet to be found" is philosophically questionable.