“There’s a very clear pattern observable in both plots, which tells us that the residuals are likely to be autocorrelated, which would mean that the 4th assumption is not met. Next to that, we can also clearly see that the variance differs over time, which would indicate that the 3th assumption is violated as well. Both violations would lead to a falsification of the model.”

LOL.

Of course !!! These are the bubbles and periodicities in the pattern. The other Burger copied my model from Reddit but there I clarified that the full model is a power law plus log-periodic bubble.
Congratulations you just found out BTC has bubbles.
Good Job. I will read the rest of the article and reply with my own article.