Obviously the number crunching that led to a 4M $ Bitcoin price in 16 years doesn’t account for accelerating debasement
How about the purchasing power of USD in 16 years? Inflation will increase the money supply. Meaning people will hold dollars to purchase durable goods or better quality goods and the "cheap" crap will increase in supply to accommodate high time preference people. Meanwhile those with new credit or stable credit will front run the price discovery of others and supply of good items will decrease as money supply expands for elite debtors.
$4M in 16 years might buy you a pickup truck, moped or skateboard.
The M2 weekly chart became monthly because even the Saint Louis Federal reserve can't track the money supply.
https://fred.stlouisfed.org/seriesBeta/WM2NS
Discussion
No, it takes in to account prior accelerating debasement only and assumes acceleration remains constant.
If there is “jerk” (meaning a change in acceleration), this will not be reflected in model extrapolation.