According to @WatcherGuru, eight years ago today Bitcoin (BTC) set a then-all-time high of $15,000, marking a notable round-number milestone in BTC’s price history that traders track for long-term context (source: @WatcherGuru on X, Dec 7, 2025). For additional context, public BTC-USD price history reflects the first sustained break above $15,000 in early December 2017 during the 2017 bull run, situating the $15k level as a historical reference in cycle analysis (source: Yahoo Finance BTC-USD historical data).