Economists in general have terrible records - no one is out investing other peoples money just on the back of an economics degree (more likely an MBA, and some undiagnosed psychopathy).

Krugman is fairly open in saying as much, so his worth is more in deconstructing what went wrong after the fact…He definitely has interesting takes on stories as they unfold and when it’s over he genuinely tries to figure out where he went wrong.

For my money, it beats the alternatives who made completely terrible predictions and just deny they made any such predictions after the fact.