[opo]

>...The common rule of thumb is you can live off of an investment at 4% indefinitely

Your general point is right, but the situation is even worse than you say since you are misinterpreting the 4% rule. It isn’t that you can live “ indefinitely” - it is that using historical returns, you could live about 30 years taking 4% (allowing for increases due to inflation) off an investment before it is zero. People seem to think that taking 4% means you won’t have to touch your capital - that isn’t the case.

>...What we now call the 4% rule comes out of research by financial planner William Bengen in the early 1990s. Essentially, Bengen tested a variety of withdrawal rates on several different allocations of stocks and bonds using inflation data and investment returns going back to 1926. After crunching the numbers, he concluded: "Assuming a minimum requirement of 30 years of portfolio longevity, a first-year withdrawal of 4%, followed by inflation-adjusted withdrawals in subsequent years, should be safe.”

https://money.cnn.com/2018/02/07/retirement/4-percent-rule/i...