Bitcoin's price surged above $80,000 on September 18, reaching $80,856 and gaining 5.60% over 24 hours. This rally was attributed to a broader technology-led relief rally, yen weakness, and a return to net inflows for US spot Bitcoin ETFs, which recorded $159.5 million on September 17. The advance began in European trading, hours before weaker-than-expected US economic data was released.