I just read a post on Decentral (https://en.decentral.news/bitcoin-search-drops-according-to-google-trends-data/) that says Google has presented data that shows that searches on Google pertaining to BTC have dropped to a three year low.
I really don't see anything alarming about this, alarming is the drop the prices of crypto currencies have had this year, and even then we had way lower prices last year so I don't think that we have such a big problem.
Of course the market cap and price for crypto currencies has fallen considerably, and therefore enthusiasm has been seeing a low which is quite logical. Also I think many people don't use Google to research the crypto world they are using forums, Reddit, and other sites that are completely dedicated to this market.
So yes, I think it is logical that Bitcoin Google searches are down, and even if Bitcoin prices go up and reach similar or higher prices than late last year, Google will not find as many searched for Bitcoin as they had just a few years ago.