That’s because the ability to write messages is tied to a quirky Bitcoin feature called OP_RETURN, which lets anyone attach a small text string to a transaction. The text gets permanently timestamped into the blockchain alongside the transfer of money. The function exists for technical purposes; mainly, developers use it to timestamp documents or embed small proofs. That said, users can use the function to leave personal notes.
The Coldcard hardware wallet exploit, first detected on July 30, has snowballed into a major self-custody breach, with confirmed losses now topping $100 million.
What people are actually writing
The plea that opened this article isn’t the only one. Several similar messages have surfaced, according to on-chain tracker Arkham Intelligence.
One reads “Please Please Please” alongside an address; another bluntly asks for “80% of my 5 BTC” back. Whether these come from genuine hack victims or opportunists capitalizing…
