I'm gonna have to lock this as it's NGTH.
While the idea in theory would be kind of cool, the potential for abuse is just way too high. It could basically be used to transfer BTs from one player to another. You could start to see multiple players being made as "BT farmers" always training on light and buying pieces from players at high price to load BTs up on a select few dots.
it's just way too exploitable, and thus isn't feasible.