I understand your argument and i know many on this forum share it. I'm not saying i'm right and your wrong. Hell, people have been battling about this for a long time and still there is no consensus. The problem i see with your argument is that when you give the farmer less BTC every month because it is worth more he won't be able to pay back any loans he has. You could solve it by making the loan less BTC every year but then why would anybody lend it if you win more by just holding.
Loans in BTC particularly are not feasible due to its extreme volatility.
But if a currency is used by an entire nation, its price won't fluctuate that much. A stable currency would increase in value proportionally to the economic growth of its user base. Loans would then be a possibility, likely with low interest rates. Like they were during the gold standard (during the second half of the XIX century in the US, for instance, prices would systematically fall)
To be honest i don't see a problem with an inflationary currency. In my point of view, i see currency as one thing and a store of value as another. I think of currency like a hot potato which you want to hold for as little as possible. It's just something that makes trading easier but doesn't have any value by itself. Also when a currency loses purchasing power, the wages become bigger so there is balance. So when a worker gets his paycheck, he buys food, pays his rent etc and the part that he wants to save he invests in gold, silver, real estate, BTC etc.
You're ignoring that inflation is not neutral. Those who receive the money first profit from those who receive it last, by being able to buy things before prices account for the new money. When the last people in the chain receive the new money, it'll be already too late. So, at least (when we're talking about 'simple inflation'), it is a nefarious wealth transfer mechanism. It's the most disguised of all taxes, and tend to hit harder on the most ignorant and/or poor.
And that's not all. Inflation nowadays is not simple. It's always directed to the credit market, creating signals to investors that there's lots of resources to invest in long term projects, Obviously creating money doesn't create resources, so this false signal will trigger a malinvestment boom which will result in a burst. These boom and burst cycles result in lots of lost capital. You can read more here:
https://mises.org/daily/672Nobody is forcing anybody to hold a currency, i don't see why somebody would like to hold it and complain that it loses value.
You're forced to hold at least some because you're forced to pay your taxes in fiat. The network effect of the banking system will also ensure you hold much more than what you strictly need only for taxation.
Let's hope Bitcoin makes it easier to live without fiat one day.