Capitalism is not as good as you think if it comes to the point where 1% of the population owns 90% of the money. It's hard to find examples of honest trade, rather more and more poverty and slave labour while the fat pigs get fatter.
This sort of thing doesn't happen in capitalist systems. It's socialist societies, like the USA, that have these issues.
Yes it does. They are definitely not mutually exclusive. Please look up what the terms mean.
Capitalism involves, among other things, the private ownership of the means of production and private property (and accumulation thereof). Whereas this is not the case with Socialism, strictly speaking.
As you may be aware the USA has a very strong history when it comes to protecting private property rights, likely stronger than any other country on this planet. It's absurd to call the uSA a socialist society, as much as it is to call Cuba, for example, a capitalist society.