The Quantum Issue: Quantum Isn’t Coming For Your Bitcoin

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For as long as Bitcoin has existed, new forms of FUD (fear, uncertainty, and doubt) have been used to predict its demise. Despite this, Bitcoin has grown into a multi-trillion dollar asset and begun to take its place in the global monetary order. In recent months, the specter of a cryptographically relevant quantum computer (CRQC) enabling an attacker to recreate secret keys from public keys and sign Bitcoin transactions moving other people’s coins has returned as an evolved form of FUD. Is this a realistic threat to Bitcoin’s continued growth? In a word, no. There is no evidence that a CRQC will be built within a decade, and it remains unknown whether such a machine will ever be built. The quantum threat remains FUD.

To date, no quantum computing machine has computed anything out of reach of a precocious 6-year-old (confirmed empirically). Quantum computers are remarkable technology and showcase the truly science fiction worthy capabilities of the modern world. These devices harness foundational technologies such as optical tweezers, laser cooling, superconducting flux qubits, electromagnetic traps, dilution refrigerators, and many more. Within these devices individual qubits are coerced into specific subatomic states (different for each candidate technology), entangled into superpositions, manipulated to represent computations, and then their subatomic properties are read and interpreted. The astounding truth is that these devices exist, and can be manipulated to produce meaningful computations across a handful of inputs. The cold reality check is that (for an example candidate tech.) to do a computation that a small child can do requires enough power to air condition a Texas high school, many hours of setup, and further hours of post-processing.

I know what you’re thinking, “but there’s so much money flowing into quantum computing”. Does money flowing into a field correlate with the rate of real-world technological progress in that field? Not really. In fact, it can be argued that until the correct underlying technology has been developed and the product-market fit confirmed, money flowing into an area has a negative correlation with the likelihood of applicable technology being developed. This can be clearly seen by comparing NASA’s Space Shuttle program to SpaceX’s Falcon 9. SpaceX took (mostly) known science and reduced it to practice to satisfy a de