> This is almost certainly due to Japan’s imbalanced age distribution.
The main issue is very similar to the US 2008 financial crisis, because of a huge asset bubble which encouraged Japanese banks to create a huge debt overhang. This turned most of Japan's banks into zombie banks, liquidity dried up. A textbook debt crisis.
Debt overhang and risk averse banks, leads to a pull back in propensity to spend or invest, which lowers demand and triggers deflation.
Yes, demographics can alter the long term tendency, but there was a step-function change in 1989 and in 2008, it wasn't like people suddenly became old. The common theme was a huge debt crisis, banking system collapse, followed by anemic response by the Japanese until Abe.
Greece had a huge deflationary spiral at the same time their debt crises hit, you think that's a coincidence? You think demographics explains the deflationary spiral in the Great Depression, which was mirrored in the US and UK? There was a 30% deflation in 1930-1932.
Let me quote Friedrich Hayek, the patron saint of the anti-inflation Austrian brigade:
"I agree with Milton Friedman that once the Crash had occurred, the Federal Reserve System pursued a silly deflationary policy. I am not only against inflation but I am also against deflation. So, once again, a badly programmed monetary policy prolonged the depression."
A deflationary currency is simply a bad idea for a currency, it has a built in penalty against borrowers -- and regressive in that regard -- and would put downward pressure on demand. Couple that deflationary currency with one that is highly volatile, whose issuance can't be controlled, and you have a recipe for an future economic disaster.
I'd go one further, if it some point in the future, SHA-256 is cracked or some flaw was found in your crypto-currency, you've managed to centralize a flaw whose scale of attack is world wide, and nearly instantaneous. If such a currency replaced all other currencies, you'd in effect, have detonated a virtual electro magnetic pulse over the world economy, making trillions worthless overnight.
Do we really want to put the store of value of the entire world under something whose value could be erased in a nanosecond if there's an undiscovered flaw?