Coins have been around since the time of Aristotle and have been obsessively collected since (at most recent) the ancient Roman Empire. You can still buy gold coins whether for a hobby or for a business opportunity. What should you know about coins and coin collecting before starting a portfolio?
First, carefully analyze your sources. In the beginning, your primary goal is to assemble a large quantity of above-average coins. You are not avoiding coins in circulation; you are merely avoiding worthless coins. You may be able to find coins in circulation that are worth something above face value. Use this as your starting “capital” so you can buy something worthwhile.