Ken Griffin, founder of Citadel, warned investors about modest economic growth and the rising U.S. national debt, emphasizing the irresponsibility of current borrowing practices. He predicts a below-potential economic growth due to a challenging landscape, with net interest spending expected to hit 3.1% of GDP in 2023. Despite these concerns, Griffin sees potential benefits for consumers from falling inflation and rising wages, and expects improvements in fixed-income markets. Citadel's flagship hedge fund gained 15.3% last year, managing about $59 billion.