The main risk for bitcoin is its future security budget and to mitigate this it will need to start generating sufficient fees on a consistent bases. The cosmos community has always been very aligned with bitcoin and is coming up with a solution to make use of bitcoin POW to help secure POS chains (eg: babylon). To what extend do you think the usecase "securing POS chains" will help the security budget of bitcoin and do you expect the cosmos community to come up with more usecases for bitcoin?
The unfortunate reality is that providing a timestamping service is consumes a minimal amount of Bitcoin blockspace and thus doesn't really with the security budget if you also want the chain to be able support a modest amount of value transfer.
IMO the best chance of Bitcoin blockspace being valuable is if the market perceives data availability on bitcoin via sovereign rollup or inscriptions to be uniquely and durably valuable.
Bitcoin's power at a timestamping system is strongly tied to emissions and it needs to instead become a valuable data availability system to secure itself after emissions run out.
I do think if the proof of stake world starts timestamping itself into Bitcoin it does increase Bitcoin's relevance into the growing world of high throughput chains.