Why do you think the monetary base of bitcoin cannot be expanded? The protocol may change one day. Also IOUs in bitcoin off-chain would increase the money supply.
Such a change to the protocol would require a quorum of the community and could not be initiated without their agreement, that said it is possible
Such an example would be known as a Fork an example did occur recently
http://bitcoin.org/chainfork.htmlhttps://en.bitcoin.it/wiki/MythsBecause the monetary base of bitcoins cannot be expanded, the currency would be subject to severe deflation if it becomes widely used. Keynesian economists argue that deflation is bad for an economy because it incentivises individuals and businesses to save money rather than invest in businesses and create jobs. The Austrian school of thought counters this criticism, claiming that as deflation occurs in all stages of production, entrepreneurs who invest benefit from it. As a result, profit ratios tend to stay the same and only their magnitudes change. In other words, in a deflationary environment, goods and services decrease in price, but at the same time the cost for the production of these goods and services tend to decrease proportionally, effectively not affecting profits. Price deflation encourages an increase in hoarding — hence savings — which in turn tends to lower interest rates and increase the incentive for entrepreneurs to invest in projects of longer term.
And BTC basically proves the Austrians wrong, the velocity of BTC is terribly low, the interest rates are high, investment is low (the only investment is in more mining equipment) and hoarding is rampant. If not for the fact that BTC is using USD as a unit of account for virtually every transaction and it's commerce base is largely black-market activity benefiting from the pseudo-anonymous nature of the coin their would be virtually no commerce what so ever.
It's still too soon to prove that the Keynesians were right in regards to that point, velocity is much higher than what it was even a year ago, and the currency and economy is still developing.
An increase in investment's has caused the currency to keep appreciating even as more units are being created.
Interest rates are high as the growth of the money supply is still 10% a year as explained in the chart.
This question will become more interesting once interest rates stabilize at lower rates.
Hoarding is rampant but increasingly less prevalent we can find proof of this is in bitcoin days destroyed and you can see that the currency is increasingly being spent as more time passes.
Furthermore it is stabalizing big block sales similar to what happened in GOX would have lowered the price by 70% a year ago and increasingly affects it less as more time passes
https://en.bitcoin.it/wiki/Bitcoin_Days_DestroyedUSD is not what bitcoin is backed behind it is in it's own right a globally convertible currency so considering this point incorrect.
Point about commerce being primarily Silk Road is outdated please update your references
https://en.bitcoin.it/wiki/TradeInflation is simply a rise of prices over time, which is generally the result of the devaluing of a currency. This is a function of supply and demand. Given the fact that the supply of bitcoins is fixed at a certain amount, unlike fiat money, the only way for inflation to get out of control is for demand to disappear. Temporary inflation is possible with a rapid adoption of Fractional Reserve Banking but will stabilize once a substantial number of the 21 million "hard" bitcoins are stored as reserves by banks.
Given the fact that Bitcoin is a distributed system of currency, if demand were to decrease to almost nothing, the currency would be doomed anyway.
The key point here is that Bitcoin as a currency can't be inflated by any single person or entity, like a government, as there's no way to increase supply past a certain amount.
Indeed, the most likely scenario, as Bitcoin becomes more popular and demand increases, is for the currency to increase in value, or deflate, until demand stabilizes.
To surmise would not say the Austrians are out of this argument by far yet.