I entered the crypto market at a time when Bitcoin traded around $6,000 — yes, that long ago. Back then, it existed in a no man’s land between experimentation and finance, and the market reacted to headlines or influential voices in a knee-jerk manner. That wasn’t just my impression. Years later, a study analyzing Bitcoin and Dogecoin during the 2020–2021 cycle found statistically significant increases in price and trading volume on days when Musk posted about cryptocurrencies
source: https://beincrypto.com/crypto-news-reaction-matures/