The S2F model refers to the ratio of an asset’s current inventory (or circulating supply) to the production flow (or mined tokens). The higher the figure, the scarcer the asset.
In refining the model, PlanB came up with S2FX, which allows the valuation of other scarce assets, such as silver and gold, with a single formula. This new model also introduces phase transitions to introduce a new way of thinking about the maturity of assets.
According to his model, the Bitcoin price will reach a level of $288,000 in 2021. Since the analyst PlanB compares the current run with 2013, much higher price levels could follow. At the moment, this does not seem feasible, but as we all know, Bitcoin is always ready for a surprise.