.txt files can be masked executables ( .txt.exe ) that install keyloggers.
: Delete any files or emails referencing this name immediately. Do Not Pay legacybtcfile21novtxt exclusive
One possibility is that "legacybtcfile21novtxt" refers to a specific text file related to Bitcoin that was created or discussed on November 21st. This could be a document outlining changes to the Bitcoin protocol, a software update, or a discussion on a particular aspect of the Bitcoin network. a software update
Older Bitcoin addresses starting with a 1 (P2PKH). legacybtcfile21novtxt exclusive