I don't have an opinion on BTC (or gold for that matter) but this widely-distributed meme is simply untrue.
1) If I have a bar of gold, and it will buy me 1% more bread loaves in a year's time, but I can invest it in something that will trade for 2% more bread loaves next year, then I will spend it because despite appreciation it is not my best source of appreciation.
2) I have living/operating expenses that I consider to supersede my need for financial return. If I don't pay for shelter and food, I won't be around in a year to enjoy the 1% more bread loaves I would get from appreciation.
3) Empirically/historically, over long time frames, gold appreciates in real terms (slowly). And yet people spent gold coins and gold-backed notes regularly.
Now, if a currency is appreciating much faster than anything else in the economy I agree you can have a deflationary spiral and a liquidity problem. But this is because the economy is collapsing — ordinary sources of growth have disappeared or reversed. This is a very special situation, and is not a general argument that currencies must depreciate.
The purchasing power of a currency doesn't have to change, the government manipulators could target 0% inflations just as easily as they target 2-3%.
Most modern economies are driven by debt, thats what "creates" new wealth out of thin air. The main reason we target a low, steady level of inflation is to best incentivize lending and investing in debt. If currency value is allowed to swing wildly you can't put a predictable price on future money. If currency is allowed to lose value (deflation) you are incentivized to hold onto it rather than buy up debt. Noone buying debt means noone creating money out of nothing, meaning no GDP growth unless velocity increases.
Ah, that would explain why we abandoned the gold standard. No one ever spent those gold coins, and no trade existed before 1933.
Isn't this only true with the removal of the gold standard?
I'm not deeply steeped in macro-economics. Is this a theory, or an historical observation? Where can I find more about this?
In the context of Bitcoin we are talking about the modern world. The major forces in the modern world are Globalization and Technology. Assuming you don't want China to take over the world you need growth. Growth happens when investment and debts are created. Ray Dalio explains it well. https://www.youtube.com/watch?v=PHe0bXAIuk0&ab_channel=Princ... This is why successful countries like the USA target 2-3% inflation. It is theoretically possible to create a country where inflation was -1%, but technological growth, which is very hard to stop would create a deflationary spiral that would bring the economy to a halt.
Also, there is a 3rd group that thinks it is a hedge. With hedges you don't really care if the price is going up or down. You want it to give you options. For example, you may buy a stockpile of food or toilet paper, not because you are hoping to turn a profit, but to give you an option to avoid going to the grocery store during another panic buying situation.