I decided to test all the presented services for the desired combination: Bitcoin wallets. Duckduckgo, in addition to basic information about bitcoin wallets, also shows all sorts of links to news articles from different years in the search results. This service has less concentrated information than the same gibiru, or startpage.
Yep. Not sure about gibiru, but startpage is pretty much almost just a wrapper for Google, so as expected results would be better. DuckDuckGo on the other hand— they have their own search results algorithms so you're pretty much exchanging privacy for less-good results. Unfortunately Google will still be the best.