Bitcoin doesn't pumps. Right now whatever growth it is experiencing is genuine. People are investing, bitcoin is getting media attention, some countries are overwhelmingly supporting bitcoin, all in all there is a positive atmosphere with some instances of negative news that comes and goes. There is a legit increase in demand. But yeah with growth there are always some instances of pump but then Bitcoin always go a correction phase after ATH. In October, most probably the growth will be there as market is over China's FUD.