This is the wrong way to think about things. The task of communists is not to save capitalism from itself (as the social democrats wish to do) out of fear of fascists taking over. It is to build a disciplined, militant and class conscious revolutionary movement such that when the time comes it is us and not the fascists who will lead the masses. It is a complete waste of your energies to worry about whether capitalism is declining too quickly. If it is declining quickly that just means we have a better opportunity to educate, agitate and organize, taking advantage of the discontent that the decline is causing. The more the collapse accelerates the more we must redouble our efforts.