There was a 2013 study that showed Google Trends is a useful tool in predicting daily price changes for stocks.
"Google Trends data was useful in predicting daily price moves in the Dow Jones industrial average, which consists of 30 stocks."
It seems logical that it might also be useful for cryptocurrency price movements.

https://www.forbes.com/sites/davidleinweber/2013/04/26/big-data-gets-bigger-now-google-trends-can-predict-the-market/#1368ab614642