The four year cycle is rooted in the most basic business sense. Supply and demand. Every four years the new supply gets halved while demand increases, causing a jump in price every four years.
Yep, that's basically the theory I'm questioning here, at least a bit

I'll try to get a bit more precise.
- Demand is long term in a surplus with respect to supply. This can be deducted by the long term price trend.
- Supply is still growing, but each 4 years the (supply) inflation rate is halving.
- According the halving cycle theory, the demand/supply equation becomes different after each halving. This means, the halving inflation rate drop is significant enough to "boost" the price and cause the "price jumps".
- However, in the last halving the inflation drop went from 1.6% yearly to 0.8% yearly. My theory is that this is not enough anymore to create this price boost on its own (it may have been enough in 2012 and 2016, but I think the prices boosts 2020+ weren't caused by halvings).
- The regular crashes (the main topic of this thread) are also not really coherent with the halving theory. The crashes are an indicator that the demand fluctuates
much more than the supply inflation reduction, because it shows this fluctuation "outcompetes" the previous "price boost". This means, for me, that also the "price boost" is caused not by supply mechanics but by other factors influencing demand.
Thus my conclusion is:
- Scarcity and supply inflation reduction does matter. This is not what I'm questioning.
- But the exact timing of price boosts and crashes is more dependant on demand fluctuations (e.g. caused by the attention economy) than the halvings themselves.
- That we saw a correlation 2 times now in a row between halvings and boosts/crashes, is a consequence of a self-fulfilling prophecy and mass psychology which makes demand fluctuate much more than the supply inflation.
This is even a much more optimist theory than the halving cycle theory, because it means that Bitcoin demand is not depending on the halving cycles. It means also that Bitcoin, if it converges to a stable state eventually, could sustain a high price.
I believe you may have misunderstood my point that money printing = surge in M2, then THEREFORE an increase in inflation.
But what you describe as "money printing" I would describe as "increase of M2 in relation to GDP". This means, a "lax" monetary policy by the central bank (like quantitative easing or low interest rates) which increases "money printing".
Money is "printed" all the time by banks when they give out loans, and if GDP grows it is completely normal that there are more loans and thus more money in circulation. But if the Central Bank decides to increase the money supply (generally because inflation is below the goal of ~2% or the economy is in recession) lowering the interest rates or deciding QE programs (like when they buy bonds with newly printed central bank money) then we'll see a M2 growth which is higher than the GDP growth. And that's what matters for me here. The correlation to the BTC price isn't clear in this case, as I wrote above.