These things are hard to predict, especially since every day is essentially uncharted waters when talking about crypto. When we talk about Bitcoin, the proverbial pioneer of this asset class, there are some very interesting things to consider. Like 85% of all the Bitcoin that can exist, already does exist. The remaining Bitcoin is a known quantity, with a known (or at least a reasonably known) "extraction" cost and time-frame, making the mining a comparatively easy cost-benefit calculation, if future value is stable.
Imagine if the same were all known knowns for gold: that we KNEW how much gold there was in the world, and that would ever exist in the world, knew when and where the remaining would be found and at what extraction cost. What would this knowlege do to the price of gold?
Then, we also have to consider "burn rate" for Bitcoin. I've read where it is estimated that anywhere from 5-10 million Bitcoin have been burned or lost, virtually cutting in half the available quantity, EVER available, almost in half. So, again, what does that do to the price of an asset's supply and demand calculations?
I dunno. But if I figure it out, I'll let you know...for a fee of a million bucks per!
RE: German Bank says BTC "should" be worth $90k in 2020