There's a story we tell ourselves about cash. It's the safe choice. The responsible choice. When markets are plunging and headlines are terrifying, there's a deep, primal comfort in knowing your money is just sitting there, untouched, protected. But that comfort is an illusion. Cash is not safe. It is a guaranteed, slow-motion loss of purchasing power. And the numbers prove it.
Take a simple example. In early 2014, you put $1,000 in a standard checking account. No interest, no risk, no fuss. At the same time, the Consumer Price Index — the government's measure of what things cost — stood at about 234. By early 2024, that index had risen to 308. That means a basket of everyday goods and services that cost $1,000 in 2014 now costs about $1,318. You still have your $1,000. But it buys what $760 would have bought ten years ago. You lost nearly a quarter of your purchasing power by doing absolutely nothing wrong. That is what inflation does. It doesn't break down your door. It picks your pocket while you're sleeping.
Now, you might say, “But I keep my cash in a savings account.” Fair enough. The national average savings account rate has bounced around between 0.01% and 0.50% for most of the past decade, only recently climbing toward 4% as the Fed fought inflation. Even if you earned an average of 0.5% over the last ten years, your $1,000 would have grown to about $1,051. After adjusting for inflation, your real purchasing power is down roughly 20%. You earned interest, and you still lost a fifth of your money's ability to buy things. The bank paid you to lose.
This is the trap that traps so many cautious savers. They see zero volatility in their account balance and feel protected. But volatility is not the only risk. Inflation risk — the erosion of what your money can actually do — is just as real, and over long periods, far more damaging. A 30-year-old who keeps their life savings in cash will retire with a balance that looks the same, but buys half as much. That's not safety. That's a retirement crisis waiting to happen.
The way out of this trap is to accept some investment risk in exchange for the chance to outpace inflation. Equities have historically returned about 7% annually after inflation over long periods. Bonds, even with recent struggles, have provided modest real returns. Real estate has generally tracked or exceeded inflation. Gold has preserved purchasing power across centuries. None of these are guaranteed, and all of them involve volatility. But volatility is the price of real returns. The alternative — the false safety of cash — is a guarantee of loss.
On this site, you can see this dynamic play out visually. Select US Inflation Rate and watch your purchasing power shrink. Then compare it to the S&P 500, or gold, or even Treasury bonds. The gap between those lines is the real return you earn by taking risk. It's the cost of staying on the sidelines. Investing isn't about getting rich quick. It's about making sure your money doesn't slowly disappear while you're looking the other way.