bitcoin currency and block technology was invented , if block technology universal in the world , we need a based on block search engine it ? google web-based search technology will be out of date it?
You have some wrong info. Blockchain tech has been around since the 20th century.
But you're right about a decentralized search engine. Google caters to their ads and obviously some kind of central nepotism or favoritism that influences the search results.
A decentralized search engine will be more fair and unbiased.