heaters, coffee tables, couches, etc
Well then you want stable prices for heaters, not for Monero. You won't achieve those with a currency that's fixed in supply.
monero does not have a fixed supply over time. it has a tail emmission that slowly increases supply over time to replace lost coins. Since that is slightly inflationary (though always approaching zero) that puts a slight downward pressure on price. Not much, but it does exist.
But the supply needs to grow & shrink as needed. If/when the economy shrinks, the supply needs to shrink. Fiat central banks have very limited ability to shrink the supply that's why there was an oversupply of money when the economy shrank during Covid and we're still feeling the consequences of that. Monero's only ability to shrink the supply is through attrition which is even worse. Fiat central banks also have limited ability to grow the supply, mostly limited by interest rates not being able to be below zero. Monero's ability to grow the supply is even worse. Especially during a purported adoption phase when the Monero economy grows massively the supply also needs to be massively increased for prices to remain stable.
Well, as the Monero economy grows, what you will find is something we have not seen in a very long time called deflation. And yes, that means some people will not buy some things at some times, but your day-to-day necessities will be purchased no matter what. It's not like you can choose to not buy toilet paper today because it will be cheaper tomorrow. If you need toilet paper today, you will buy toilet paper today irrespective of the price unless it's just way out of whack, which it would not be.
People can just choose to pay fiat which is more stable. Your Monero circular economy won't get off the ground.
We have different opinions on this, and I guess we shall just have to see who is right. Best of luck to you.