You list yourself as an engineer, but your analysis is BS. The trend fit line is based on "linear trend fit". There is no exponential component to the trend fit I did.

You could choose to do an exponential fit if you want, but that is not what you see in the analysis above.

I intentionally did not choose an exponential fit, since an exponentially increasing curve is not sustainable. I think the increase in price of LTC is sustainable, and it NOT increasing in exponential way.

R^2 is much lower when you try to fit exponentially. For the LTC data series.

The "real trend line" that you see on the chart is directly from Excel.

I don't believe you passed the engineering stats class. I frankly doubt you are an engineer based on your comment about "there will have to be an exponential price development".

That was exactly the point my post was proving is NOT needed.