There are many instruments in the market nowadays that allow you to invest you money wisely rather than putting them in a safe or a bank that gives you 5% p.a. Image that if you were to put RM1 into a bank saving account in 1967 with earning interest of an average of 5% p.a. After 30 years with compounded interest rate, most likely your bank account will have a balance of RM4.32. However, if you would have to keep a piece of uncirculated (UNC) of 1967 issuance RM1 note, you would probably end up with a wealth of RM30 that equals to 12% return yearly.
An UNC 1967 RM1 Banknote worth of RM30 today
You might wonder that why and how a piece of RM1 banknote can worth 30 times after many years. In fact, this is just a typical example, there are cases where the value of a banknote can increase so drastically due to is scarcity and high demand from collectors. Bear in mind that there are many collectors around the world that are willing to offer high price for a piece of banknote that they wanted to OWN it.