Capitalism works by maximizing profits by means of automation but in the process destroys the value of the products it produces. The danger is in capitalism ability to self disintegrate without ability get itself together on it's own and thus make societies descend into perpetual pessimism. Capitalism is a flawed system, but all other systems are even more flawed.  Are we doomed? I think not. The solution will come from technological advancements - as always.