Bitcoin. Good Question.
Bitcoin is one good question. It challenges the user with simply providing the secret key which matches the public key to spend. Just ask Bitcoin one good question and it can unlock all the money in the world.
Stated differently, Bitcoin is about identifying the right problem. Problem identification is key to good decision-making and problem-solving. Asking Why enough times to get to the underlying factors that make up the challenges in front of you. This root cause, uncovered by the successive Why?, is the problem we must go after. This problem is, after all, the money.