I propose that we adopt the Thai baht currency symbol, ฿, as the official bitcoin currency symbol and BTC as the official bitcoin three letter currency code.
I don't think there is a problem with it because the $ is also using by other countries as long as they know what currency it is then there is no confusion will happen and I think the physical money itself will still be the best reference by the money exchangers.
What the problem by bitcoin symbol? I think there are not have the same symbol like bitcoin with many companies and other project, I like with bitcoin symbol because very simple and interested with many investor, I found many the shirt using bitcoin symbol and give best promoting for many people using bitcoin symbol to help bitcoin have higher price.