Bitcoin's scarcity isn't just a digital artifact; it's a marvel of social consensus engineering. Even scarcer technologies may emerge in the future, but their value will be challenging to replicate.
Scarcity comes from having a limited supply therefore we can always have coins that are more scares than Bitcoin but this doesn't mean they'll be valuable than Bitcoin. Bitcoin being valued this much isn't coming from it being scarce but because it's a combination of many things that add value to an asset. For me I think even though more Bitcoin gets added to the already existing supply which isn't impossible still it won't discredit Bitcoin value. For assets to be more valuable than Bitcoin, they'll have to build a stronger community that supports and trust them the way Bitcoin investors do. Having more scarce assets in the future won't stop Bitcoin dominance in the market.