A Perth high school teacher who doubles as a coin enthusiast in his spare time is teaching Australians what to look out for to make a killing from rare money. Joel Kandiah goes by the moniker @thehistoryofmoney on TikTok where he has nearly 100,000 followers. Some of his videos have gone viral with up to 1.3 million views. All kinds of things make a coin more valuable than its perceived worth, according to the commerce teacher. Some gold coins have minting errors, or notes are from a certain batch, or even being a limited edition makes them goes up in value for collectors. Here’s what to look out for, according to ... (full story)