Pretty sure that S2F was predicting above $100k BTC during the last cycle which of course didn't happen. It's just like those moon math charts - they eventually fail and get updated with new price history to extrapolate, and then fail again anyway.

I have my own theory that the price growth is slowing down from cycle to cycle because emission has less and less impact on the supply, so for having some huge price ranges like $500k there needs to be a surge in demand. Here people would start talking about being hedge against inflation, replacing fiat and so on, but Bitcoin failed to perfectly counter inflation and negative economic events, in fact it went down many times during those periods, because it's a high risk asset.