In the United States, most people's income growth stalls around 45 years of age because they have stopped learning new work skills and related knowledge.<ref>[https://www.youtube.com/watch?v=gy-K3oLv5Bg How to Double Your Income], Valuetainment YouTube channel</ref> | In the United States, most people's income growth stalls around 45 years of age because they have stopped learning new work skills and related knowledge.<ref>[https://www.youtube.com/watch?v=gy-K3oLv5Bg How to Double Your Income], Valuetainment YouTube channel</ref> |