Gold
One of my favourite topics to discuss of all time is money. Just what is money anyway? Humans are the only creature on Earth that need money to survive. It ties to every facet of the living experience. Therefore it is pivotal to understand it. And yet, most people do not understand it. It is never taught in schools. Think about it. Most people have a job and earn a wage, and call it a day without understanding what are they saving. To someone in Australian, Australian dollars is money. To an American, the US dollar is money. To a Swedish person, the Swedish krona is money. But really, what is it exactly? Are these currencies really "money"? If I take my Swedish kroner to Singapore, why is it not accepted then? If something is truly reliable money, it should hold its value across borders, even if it isn’t directly accepted everywhere. To understand the importance of money, real money, cannot be understated enough. Let me start from the beginning.
Historically, for thousands of years, money has been different things. But over time, societies converged on one thing as the most reliable form of money.