Like the title says what are the rules. If I miraculously got a private key to a wallet that had Bitcoin in it but was not mine originally then does that mean I now own the wallet like finders keepers and is there any legality issues with this in the usa,uk,canada,south america. Is this more of a morality should you or should you not.
Suppose we assume that you can magically obtain a private key that has a Bitcoin in it. Even in such a scenario, the only possible way for you to find the key is to locate it in a file or a scrap of paper previously written by someone else. Attempting to try multiple combinations of words to open a random wallet is a futile exercise that could take an entire lifetime. In short, finding such a key requires more than just a miracle.