You’ve missed the point a bit which is why you are getting down voted. Much of our non physical world (money, value etc) are abstractions for something else and therefore the abstraction only has value in humanity’s collective imagination. If you try to give a goat farmer in the desert a bit coin he won’t take it as to him it literally has no value as he likely can’t access the internet or work out how to turn it in to something else. If we ALL collectively decided tomorrow that bit coins have no value (or the US dollar even) then it would loose its value. Much of our non physical world only stands up because we all agree it does, enough people change their minds and it all falls down.