at this point it's no longer profitable to participate. You'll have 1:1 BT to steem which If you do the math converting BT to BTS at current prices leaves you with a 20% or so loss from the USD value of the token. The real winners here are the Buildteam guys who issue the tokens and sell them at a mark up. Which is OK, props to them and their work on steemit. But buying in now is not really an "investment" it's a donation.