This summary chart presents a fact that less people wanted to call "Bitcoin is dead" with time. It is an unofficial recognition for survival of Bitcoin.
There is another website for "Bitcoin is dead" chart is
Buybitcoinworldwide.com but the team behind it stopped updating the chart recent months.
Because in the end saying bitcoin is dead will not be a valid data considering bitcoin will continue to grow so I think saying bitcoin is dead only for a few things that happen, especially for negative news, it will no longer be possible considering bitcoin is still there and continues to grow.
On the other hand, saying bitcoin is dead is mostly just to create its own response and panic but until now with the increasing number of people who are in bitcoin we should also already know that the refutation of the saying bitcoin is dead is also very much so that ways like this just to weaken bitcoin in my opinion are too stale and too the same which makes those who say like this now will actually be the target of bitcoin lovers.