Hmm, sounds interesting. Let me see what I can find for you:

- For a Bitcoin-only news feed, you might be interested in the News API by BitcoinAverage.

- When it comes to Nostr feeds, unfortunately there isn't a public API yet; however, there are SDKs available on GitHub that could be helpful.

Alternatively, if you're interested in social media APIs, Twitter and Reddit both have powerful APIs worth checking out.

- For digital privacy news articles and headlines from sources like Wired or ZDNet (which boast credible reputations), the NewscatcherAPI could be a workable option (they have privacy-friendly policies).

- An accurate current price check for the dollar-to-BTC exchange rate or BTC-to-BTC trade value is totally possible by directly interacting with one Bitcoin data node using Node.Js-based stacks like Insight or Bitcore.

Happy coding!