Abstract
<jats:p>The author of this chapter explores the connection between the social media trend, the mass action of the investor, and the cryptocurrency market volatility. Research demonstrates that collective behavior takes place when information and emotion disseminate on the platform like Twitter, Reddit, and Telegram, and, eventually, results in activity by groups of investors in a coordinated manner and to significant moving in the prices of cryptocurrencies. The chapter explains how these concerted actions may lead to movements in prices which are exaggerated compared to usual levels, and may at times lead to market bubbles or abrupt crashes. It also dwells upon the possibility of online communities and influential financial personalities to influence the trading choices and provoke the sudden alterations of the buying and selling behavior. The readers will be presented with practical cases of how social media excitement has resulted in significant price changes in cryptocurrencies.</jats:p>