So back to the coin collector. My first reaction was that it seems a little silly and boring. What’s he going to show him, some bunch of coins from around the world? So what? But then I took a look at some of the coins and turns out it’s a very fascinating lesson in the history of money that sparked some interesting breakfast conversation today. The coins are all from ancient civilizations around the world and hark back to the first invention of money. Here are some of them:

They’re not perfect in shape and are pretty crude. You could so easily counterfeit these, was my first reaction. But that’s OK, my husband said, these coins have intrinsic value. They’re worth the metal they’re made from – x grams of brass or silver for instance. So if you wanted to counterfeit them, you would have to spend the equivalent value of energy and time to mine the metal and that has worth exactly equal to its value.
Our typical text book definition of money is as a store of value. In the last few years I have been thinking of money as being a proxy for potential energy that we accumulate on some level – since it provides the power to do work and reconfigure things. So that money should have intrinsic value (like metal) makes sense to me. You could actually calculate its value in units of energy, say joules. Today we have decoupled currency from any ‘actual value’ and created fiat money. Which means money is no longer linked to something with intrinsic value like gold bars. Given this, its ‘value’ can get progressively more distorted. With this disconnect it takes on a different life and dynamics that I’m still trying to get my head around.
So to my son, I have to say, ‘I have some notional answers to your questions and this is how I’m thinking about it, but in all honesty, sweetheart, I’m almost as baffled as you are. Why don’t you go ask Dad.’
'And, hey, I already told you that we are not going to buy another Ben 10 toy right now'.