Every so often, someone claims to have created a perpetual motion machine, or a source of free energy - some kind of contraption which does work without any external power source. Anyone with any physics background knows that this is impossible, due to the laws of thermodynamics, but these claims still find a small credulous audience. Normally the device is accompanied by lots of handwaving to obscure the fact that it can’t possibly work.

Disclaimer: I’m not an expert on the crypto space, just a curious amateur. It’s quite possible I have misunderstood something important below. Do let me know of any corrections via the comment section!