This is a very insightful graph!
And it is done solely based upon the current situation of transactions vs blockchain limit.

If that is the case then I can highly presume that, Bitcoin might decline its glory when it either reaches to the PayPal level transaction processing or the Visa level transaction processing.

But one thing for sure is shown wrongly on the graph is that failure will not be from 2016. Although this is based on probability but this is for sure it wont.