With those last two proposals, I don't know if you're being serious or not.
The last boobie one no (even though it might get some more attention lol), but the 'shutterstock' B yes:) Just in terms of it being more slick and modern in its style, not suggesting to use the exact same logo but the current orange-back
BTC is too typical 'font' looking imho - like the designer just grabbed some default one from MS Word. Where as these ones I found around the net obviously have had a professional work on them.
Maybe I just have terrible taste haha