I like your thinking, but all of this is assuming that runtime for something stays precisely the same no matter what. Most operations are at least reasonably pa

I like your thinking, but all of this is assuming that runtime for something stays precisely the same no matter what. Most operations are at least reasonably parallelizable, and I would argue that cryptocurrency depends largely parallel operations, which in general should mean that breaking it is also a parallel operation. Plus with advances in quantum computing, regular computing and storage, it's hard to be sure how long any of this information will be stored for or long long someone would crack it for, or wait for it to be crackable. Also, you imply that some amazing computational shortcuts aren't ever going to be arrived at. This historically, is hard to be sure of. Not saying everything will be broken, but more of it is all the time.