I don't understand people and their linear charts. That's not how Bitcoin works. As the more people adopt, the speed increases exponentially as well as the number of adopters. Bitcoin is a virus, its mechanics are based on it. Nobody's chart ever accounts for viral spread.
That's why the chart above uses the logarithm of the fx rate, therefore you can plot a linear trendline but it is actually
exponential! This is capturing the "viral" super-growth rate.