I suggest registering a logo patent international - https://www.wipo.int/portal/en/index.html or another copyright company

Talking about patent registration on logos, as far as I know, Bitcoin Logo is released under a public domain license, meaning that it is free to use*.
https://bitcointalk.org/index.php?topic=1756.0
https://commons.wikimedia.org/wiki/File:Bitcoin_logo.svg