this is an easy guess in 10 years we should be past 1 million.
unless some one invents a new math that could magically solve sha 256 crypto.
Last time some one invent new math was sir Issac Newton
https://en.wikipedia.org/wiki/Isaac_Newtonhe figured it out in 1667 or so.
so this is the one way btc could be fucked for sure.
but the truth is no one knows if a 3 dimensional person such as a human being can invent this so called sha-256 busting math