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.
Should we channel some spiritual power to give you the answer to this? Because how are we suppose to know what will happen in the future.
Let's stop all this talk about what will replace Bitcoin, if you want it that bad you can start working on your own project then try to make it replace Bitcoin in the future asides from that just enjoy that Bitcoin is here now and we are lucky to be experiencing it.