This post is essentially a reference to my tweets. I will write a coherent blog post sometime in the future.
See, also, this thread.
Edit (26/05): See, also,
"Money or currency is believed by some to have a quantum nature. As we move towards a cashless economy and as digital- and crypto-currencies are on the rise, their diffusion will have commonality on which quantum physics operates."— Jonathan P. Dowling (@jpdowling) May 26, 2019