According to the source, the first-ever Bitcoin-related tweet was Hal Finney’s Running bitcoin posted on January 11, 2009, marking the earliest public social media reference to BTC. Source: Hal Finney on X, 2009-01-11, https://twitter.com/halfin/status/1110302988 For traders, peer-reviewed research shows that spikes in search and social attention correlate with higher short-term Bitcoin returns and volatility, so narrative-driven resurfacings can be meaningful for intraday risk management. Sources: Kristoufek 2013 arXiv 1305.3766 https://arxiv.org/abs/1305.3766; Garcia et al. 2014 EPJ Data Science https://epjdatascience.springeropen.com/articles/10.1140/epjds/s13688-014-0015-7 Actionable watchlist: monitor X mentions of Bitcoin and Google Trends alongside intraday volume and order book imbalance, and validate sentiment signals using independent social volume metrics. Sources: Kristoufek 2013 https://arxiv.org/abs/1305.3766; Santiment Social Volume methodology https://academy.santiment.net/metrics/social/social-volume/