You have a good point here, I wonder who are those whales who buy bitcoin based on google trends statistic and chart. Google is only collecting data based on the search engine, nothing else. It should not be used as an analysis to decide when to buy/sell bitcoin.
Yes, I think also - the whales buy bitcoins, if bitcoin is good for something, they targeted. The trends are important only because hype's.
The whales don't interesting in hype's. A hype is a market, what the whales not like - I think. It isn't simple to calculate the price in the hype. It can work agains whales also.
A hype will be done through many people - many many. They are new in this market allways. They needs to search before a buy. The google trends predicted three hype in bitcoin market already.
Here is the picure, what I published 3 years before...... ((on bitcointalk, I think, but the post was already deleted... I don't find it.)) Th picture was uploaded to imgur.