Google Trends records abnormal "BTC" request growth
The idea is the following. There are bots (algos) that start buying $BTC with the growing interest in it. Some speculators agter buying BTC artificially increase the nu of requests. Algos work - Price grows - Profit

Smart idea... Any restrictions? Sounds really easy
Of course mate... That is not as easy as may seem to be
An exchange can ban an arrow of orders from the bots, rate limits matter a lot. But all this depends a lot on each exchange, algos and the ambitions of the speculator themselves.