It made me remember a video on the Internet of a user asking some people for either one dollar or one bitcoin, many chose one dollar and some just asked what is bitcoin and only people who know the value of bitcoin chose it.
What determines the value differs according to the place, for example, the US dollar is accepted globally, but you may sell your local currency for a quarter of its value if you move to another country, and the dollar for half its value if a war occurs, and so on. The value of Bitcoin comes from your ability to keep it for the longest period, when it may make a real difference in your wealth.