Bitcoin was like a normal money but the difference is the price was volatile unlike the dollar that depend on the America if their economy were low. They think that bitcoin was illegal because it can transact by illegal thing. They didnt know that dollar would also can be used for that. That's why the image of bitcoin was strongly getting bad because of some people who didn't know about this and they only just say whatever they heard.
not only that bitcoin can be determine its price base on addoption and demand in tha market. The more people want to buy and have it the more the price will increase.
Unlike dollar that it is fixed and they can control the supply.