You have some wrong info. Blockchain tech has been around since the 20th century.
Wait what? There may have been a few ideas close to it in the past, but there has been no proof of concept until Satoshi came along with Bitcoin.
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.
Well they put their ads first, but I don't know about blatant bias. There's an entire concept behind making sure your site shows up high on search results:
search engine optimization. There may be
some bias, but everything is mostly determined by algorithms.
I wouldn't be opposed to a decentralized search engine, but I personally don't see the need for it. Either way, Google can also adopt blockchain tech if needs be, so blockchain technology, and much less Bitcoin, are unlikely to lead to its death.