(A2) This brilliant explanation of #Bitcoin ’s hash function protocol by @3blue1brown may help put the question in perspective.
“So even if you were to have your GPU packed with a ‘kilogoogle per person multiplanetary giga-gilactic’ computer guessing numbers for 37 times the age of the universe it would only have a 1 out of of 4 billion chance of running the hash that happens to break a given protocol.”
TL;DR: #BTC is unbreakable as the new gold standard for cryptography and cybersecurity because it’s backed by encoded math, game theory, and the laws of thermodynamics.