Not heard of the Stock To Flow model before. Thank you for your brief, well explained account of it. I will need to read up on it further.
It seems to have much credence for predicting its value by its supply and demand ie. scarcity. Certainly the halving will or should play a big role in its future price.
For me, Bitcoin and the ALT coins are in a different world when compared to other convention assets - they are so volatile (expectation and speculation).
A price of $100,000 in the middle of 2020 sounds fantastic. I will keep buying small amounts of Bitcoin, on a cost basis.