An approval of an ETF would certainly open the door for a bull run, but even without it widespread Bitcoin usage across the world and a variety of industries along with the support of investors will drive the price up. However this will take some time but I'm still confident it will start rise dramatically before the end of the year and really start to surge in the first quarter of next year once more and more big companies start rolling out innovations driven by blockchain technology and using cryptocurrency on a larger scale. Those that have not yet adopted bitcoin will forced in order to avoid being left behind in the wave of innovation.