Good catch, I have to admit I have never seen Thai baht!

While a subtle point, I think there is a different between a striked ฿, as the Baht seems to universally use: http://www.google.com/search?um=1&hl=en&safe=off&biw=824&bih=718&tbm=isch&sa=1&q=thai+baht+symbol&oq=thai+baht+symbol&aq=f&aqi=&aql=&gs_sm=e&gs_upl=1868l2741l0l7l5l0l0l0l0l0l0ll0

and the modified B with and additional ascender and descender.


Anyway, the existing iconography seems to have the same problem:

http://bitcoin.nl/graphics/bitcoin_gold.png

http://t2.ftcdn.net/jpg/00/13/56/59/400_F_13565995_euO0qDXvjoo4qC1qidvWms2fEskp2t5X.jpg

This does beg the addition of treatment using 'btC' with perhaps another logo.