Money is essentially a global accounting system that manages societal debts and obligations. What's unique is that each individual can choose the form of money – the money sign – that they use to manage those debts. Whether it's fiat currency, Bitcoin, or something else, the choice of money sign has a profound impact on the stability and value of those holdings. Ultimately, the system is built on trust in the money sign's ability to hold value and remain accepted in the future.