ay-bros-inc/btc-hack ? reverse-engineered prompt

Build me a simple Python demo that shows how Bitcoin addresses are created, but keep it harmless and educational.

I want it to generate random private keys, turn them into public keys and Bitcoin style addresses, then check the balance of each address through a public API and print the result in the terminal. If an address ever has a balance, save the address, private key, public key, and balance into a text file called found.txt.

Make it run from the command line with one command, and if the needed Python modules are missing, have it try to install them or show a clear message telling me what to do. It should also use multiple processes so it can check more than one address at a time, and it should keep showing live progress as it runs.

Please make the code clean, easy to read, and include a short README with setup and run instructions. If you need to look up current docs online for any library or API details, go ahead and do that.