Some people say bitcoin is better than US dollar but i think US dollar wins in terms of acceptance because not all people know what bitcoin is and bitcoin price is volatile and bitcoin don't have physical form you cannot touch it like dollars
Investment wise, yes Bitcoin still prefer by most people here to put their investment at as the risk is high, but the reward can be multiplied to twice or even more depending on the market condition, wherein if you are just investing in dollar, it could just give you 1-3% interest, depends on the market. So, for some people instead of buying and selling dollar they are just buying and selling Bitcoin, which is more profitable.