 Without the ability to practice, he'll have to continue to count on his lucrative painting profession. According to a new study, Atherton, California, is the wealthiest city in America. Hot and cold running Evian water. You know, they've got everything. The least wealthy city in America, I think, is still for the eighth row in a row, Skidmark, Pennsylvania. According to a new study, a lack of sleep can make it extremely difficult to retain information.