Bell Tree Bells ( TBT, BTB ) are earned by posting, trading for in-game bells, selling art, etc. You can see the amount you have on your profile or under your post count.
They are forum bells. BTB stands for Bell Tree Bells. TBT as an acronym doesn't make sense for forum bells even though people use it, but that's the acronym of the site itself.
Thank you everyone for the response. I think I have a pretty good grasp on the whole deal now. This community seems awesome already I'm glad to have recently joined
Tbt is kinda like gold except not. It buys collectables which are kinda like jewelry except not. A lot of people will pay 100tbt for 5 million. Meaning your account is at the end of the tbt rainbow except not and you have around 12 million