The beauty of the 5.25-year trendline with exponential fit (R^2=0.93 which is pretty darn good) is that it takes into account every worry of every person who has ever owned or not owned bitcoins. I put more weight on that than the individual worries of a single person.
The trendline is a representation of how people have speculated in the history of Bitcoin. As Anonymint points out we have a large merchant adoption that we haven't had the last 5.25 years. Do you think new factors with a possible large impact like this can make the trendline less accurate?
According to the theory underlying the trendline model, we
expect to encounter new factors with large impacts. A year from now, there will be new factors with large impacts that make today's large factors seem unimpressive. When we see them, it should make us more confident in the trendline model, not less.