Someone else said it too! 🙃

Yes. The Monero community really wants it to be used as a currency and not a store of value.

Will it be a decentralized currency but only for a tiny market size? Or will it become less decentralized as market demand approaches BTC?

I feel like it's the former. I often hear XMR people say "mass adoption isn't the be-all-end-all". I see it as a tool for the relatively few occasions where value transactional privacy is very important.

Kind of like a Swiss Bank Account in your pocket 🙃