Gold coin investment

It was our grandparent's 40th wedding anniversary 10 years ago and on the night before the grand party at the hotel, all his children and grand children arrived at their home for a night family reunion. Right before we left that evening, grandpa gave each of us a box with a little note attached to it. It says "True love is like gold, it never grow old". Inside the box was a piece of newly minted coin made of pure gold. At that time, grandpa said the cold coin we're holding in our hand is worth only about MYR1000 each. We were told to keep them safe and many years later, it will appreciate. Well, we did and what grandpa told us was true. Today, the value gold appreciated so much! I've learn that a way to invest is to buy gold coin. A wise investment indeed...