This method of measuring bitcoin and Etheruem prices performance is completely on a coincidence bases, it does not aligned properly to Bitcoin trends. The calculation is not reflecting on the demand/supply, factors, I think it is completely on a historical coincidence.
Again, relying on Bitcoin past trends or records to trade or investing may fail due to some certain factors like,
1. Change in demands and supply
,2.Constant FOMO
3. Bitcoin developments eg ETF
4. Speculations
I can't agree more with you, this euqations is nothing but the result of historical data but don't get why he think BTC is going to follow the same equation because as I mentioned the ATH not everytime BTC followed it but only once and this will be the 2nd time it will follow that equation and I personally thinks the price of BTC and ETH is really following the equation but it does not mean these two coins have not enough potential to give more.
As ETH have strong investments that can lead it to $5k easily and BTC is almost at $100k and that's what most of the community was speculating on but with time I think the target is going to be a little more for BTC, like for now I think it can touch $110k either.