But first you'll need to invent a time machine to start investing in a period when the S&P didn't have a whopping 25x P/E. And then you'll need to find a way to

But first you'll need to invent a time machine to start investing in a period when the S&P didn't have a whopping 25x P/E. And then you'll need to find a way to intervene in central banks and global markets so that a 4% withdrawal rate is sustainable in the new era of ZIRP and NIRP where projected future returns for nearly all asset classes are close to nothing and often negative after inflation. Good luck!