Bitcoin has a hidden message that can never be deleted.
Bitcoin block 666,666 was mined on January 18, 2021.
It contains a message permanently written into the blockchain.
Using Bitcoinโs OP_RETURN, the miner embedded a Bible verse directly into the block data:
โDo not be overcome by evil, but overcome evil with good.โ Romans 12:21
To make it happen, they paid more than 5x the normal fee to guarantee inclusion in that exact block.
The transaction is linked to wallets named โGoDโ and โBibLEโ, and you can verify it on any public block explorer.
Once itโs there, it canโt be removed.