People have been debating whether a quantum computer presents a realistic threat to the Bitcoin network for over a decade. It was a serious topic of conversation over 13 years ago when I first discovered Bitcoin myself. 

There has been quite a lot of progress, both in terms of theory and real-world engineering, since long ago when I was just a bumbling idiot trying to figure out what was going on here. 

Two major milestones have been reached since then that make a material difference in the likelihood of a viable quantum computer actually being produced sometime in the next decade or so. That doesn’t inherently mean that it will reach a point of ubiquity, or even relative…

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