Capitalism in the USA already failed once in 1929, back then FDR was able to save capitalism with his socialist policies and high taxation because he understood how the economy and flow of money worked. Unfortunately today, the oligarchy that has taken over the government (not just a problem in the USA, many countries have this problem) do not understand that capitalism is a self destructing economic system if it is not regulated with government laws and policies. They just take more and more for themselves while the people at the bottom struggle. As wealth inequality continues to increase and the majority of people at the bottom no longer have enough money to participate in the economy, things will get ugly and violent.