Imminent inflation isn't the only problem to worry about. The main problem is investors believing that the market has topped. If we keep rates low and the world

Imminent inflation isn't the only problem to worry about. The main problem is investors believing that the market has topped. If we keep rates low and the world's central banks keep buying assets, eventually prices will reach a point that people stop believing. The other option is that when expected inflation goes up, people will predict that interest rates will go up, and as a result, they'll believe that the market has topped. If asset prices drop precipitously, we might be back in 2008 (or worse).