And what good is this information?
Totally less than worthless data that leads to incorrect conclusions.
This data has been inherently manipulated in retrospect to make the correlation seem exponentially more extreme than it actually is. The scale on Bitcoin goes from 10k to 70k while the scale on Nasdaq goes from 8000 to 18000. Really? And even if it was perfectly correlated, still totally useless information as the stock market is just as random and unpredictable as anything else. Legit nothing to gain from this analysis.
Even by your own numbers the range in correlation goes from 0.9 to -0.60, so even by your own metrics these two assets are obviously uncorrelated. And then there's that section in 2020 that shows a high correlation even though the lines are totally off.