Let's break down bitcointalk :
Bitcoin Talk
Bit Coin Talk
You can't write Bi Tcoin Talk ?? What does Tcoin mean ?
The forum's Twitter account is
https://twitter.com/bitcointalkThe description is BitcoinTalk and I am fine with both BT or BCT but I would prefer to use BCT.
BTT is weird and inaccurate to use because it does not match with the full name of forum, Bitcointalk.