Yes, I hear you, it is unidirectional unfortunately. Gotta wait for DEXs like Haveno or Serai. You can use something like Trocador in the meanwhile. That's how I do it and don't have any problems swapping in or out of any crypto and pay next to nothing. I think it would be more economically rational to accept most crypto as payment and convert them all to Bitcoin (or whatever) and you could still be Bitcoin-only.
Outside of DNMs, Monero is definitely more niche atm. Do you know about Monerica and MoneroMarket? There is also XMRBazaar. Not out yet, but should be soon.
monerica.com
moneromarket.io
As for nostr zaps for Monero, looks like AnarkioCrypto is going to start working on the bounty for it sometime next month.
https://bounties.monero.social/posts/94/20-991m-nostr-client-for-monero
Bitcoin as a SoV does hold true so far so understand the pragmatism for using it as a long term savings. But performance highly dependent on when the Monero was acquired. Holding Monero short to medium term (weeks to months and even years) could go either way. Both are volatile on those scales. For example, if you held Monero from start of 2021 until now you would be pretty much even if you had held Bitcoin instead. All of 2022 Monero more than doubled Bitcoins performance. Monero seems to generally do better during bear markets. Shouldn't be a concern on shorter time scales especially if one is just using modest amounts as cash imo.
Humble recommendation. You say you started a farm to sell meat for Monero? Get in contact with Doug Tuman to get on Gratuitas! @DouglasTuman on Twitter, podcast host of MoneroTalk/Monerotopia. You'll have a wider reach. There are a few vendors there already that are Bitcoin/Monero people (Beisnerd sells maple syrup, and AUPA bar duo sells pemmican bars). I buy from Gratuitas all the time.
gratuitas.org