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?