I always like to use the "known knows" of Bitcoin for long term prediction. So what are the known knowns of Bitcoin? The total supply (21 million) and the inflation rate (halving periods). With that data we can develop a predictive model:
Basically, a draft prediction is that as the blue line becomes almost horizontal, the price should be very high. Ideally, a long term position to get filthy rich should be 2036, but from now until 2027 the curve will decrease a lot so the price will be a lot higher.
It is rather simple... the supply is limited, but the unit can be divided as small as needed, so there's enough bitcoin for everyone, it's just a function of price.
Great chart, it is impossible to think of every single thing we do not know about bitcoin or about the world as a whole, so if we just concentrate on what we know we get a chart like the one you post, and the results are clear, bitcoin is going to be the best investment a person can do, even a small amount of bitcoins can be enough to change our lives if we are able to hold for long enough, this is what I have been telling my friends but for some reason they seem unable to understand such a simple concept.