1PWo3JeB9jrGLDTmsp45h1pDXXtb7zisQH
start with 79B
Why does everyone keep trying to solve it?
I think this is a game that benefits others, not the solvers!! When more inventory was added to these puzzles, each Bitcoin was worth about $27,000. Have any of you thought about why the finder of puzzle 69 lost inventory?
Let me remind you of a few principles: Bitcoin can only consider a transaction as completed after receiving 6 confirmations in the next blocks in the blockchain network chain, and before 6 confirmations, that asset is not in your possession, and the block containing the transaction confirmed by miners may be completely removed from the blockchain chain before reaching 6 confirmations, which are called orphan blocks.
lost because he used the mempool instead of Mara. Big mistake when it's already been discussed here on how to avoid losing those funds.

Although using a private mining pool instead of a public one can prevent
double spendingRBF, but who can guarantee that the private mining pool will not embezzle the money? This is not difficult at all technically.