Just take a deep research on bitcoin first so you will know its real function and its real value. Then maybe by that time, you will know already if it has a real value or not. There might not be millions of people who come to know and invest in bitcoin if it has no real value at all. You may not see it physically, like you used to see in gold, but you will know its real worth eventually if you start investing and end up gaining huge profits. One thing i can suggest, just don't bother investing if you are not sure of it from the start. It will only give you a headache.