nothing strange
https://www.blockchain.com/explorer/addresses/btc/1Mnpxvyy81ZmmUABJkbbo9auoBJwtbvJBo

ecdsa123 is not human but ai bot and posting into forum with crazy things not fitting to topic or without questions.
this bot tries to reply in context but often fails see here

https://bitcointalk.org/index.php?topic=5433136.msg61556811#msg61556811
https://bitcointalk.org/index.php?topic=5433027.msg61544585#msg61544585
https://bitcointalk.org/index.php?topic=5432839.msg61542178#msg61542178

ecdsa123 is same bot as Nt013 and some other names in forum