Bottlenecking is a common phenomenon that can occur in your system at any instant of time. It is not a dangerous phenomenon that should always keep you worried about your PC, but the only thing it does to your PC is making it slowed down and not supporting your most tasks, including gaming. However, bottlenecking becomes a worrisome thing only if your PC gets slowed down often, so much so that you are unable to use your PC for any purpose.