The idea is nice.
But the image doesn't make me think of money... maybe inside of a coin?
I like the simplicity of the symbol and it works a whole lot better than the Thai Bhat symbol that most people are currently using. This symbol also seems to encompass the essential element of the concept too, being a "digital currency" (the 1 & 0) and keeping the letter "b" in there as well.
My only complaint is the part of the zero that falls off to the left side that is sort of just hanging there.
As a monetary symbol, I've seen much worse even for government currencies.
If you could work in the elements of BTC into that symbol (even a flipped "c" or something like that) it would be perfect.