I realize this was a joke, but there is some inflation in most currencies, including Singapore dollar inflation. In January, 2020, Singstat estimated 0.8% year over year inflation, based on the Consumer Price Index (CPI). If you're not at least keeping up with inflation net of all costs, you're losing purchasing power.
There are some investors who are willing to lose purchasing power over time. The easiest way to see this right now is to look at real return sovereign bonds, which are available from several governments including from the U.S. Treasury. U.S. Treasury Inflation Protected Securities (TIPS) dipped into negative yields across all maturities this week, even out to 30 years. Currently, as I write this, the 30 year U.S. TIPS is offering a mere 1 basis point yield. For U.S. investors TIPS interest is taxable, so on an after tax basis this is still a negative real yield.
It seems pretty crazy to me, but here we are. I've also seen
an article suggesting that, this week, the 10 year U.S. Treasury has hit a record low nominal yield since 1871, and the 1871 limit is only because nobody has been able to go back yet and reconstruct U.S. Treasury yields prior to 1871. Let that sink in for a minute: this is a record low nominal yield for the past
150 years on the world's largest economy's sovereign debt. Wow.