This is a roundup of cryptocurrency developments. Solana plans to activate Alpenglow on mainnet on October 21 around 15:00 UTC, targeting transaction finality of about 150 milliseconds. The upgrade would reduce finality from roughly 12.8 seconds, an 85-fold improvement. Solana previously postponed a September 28 activation, and the second phase has no date. Cryptocurrency prices fell after CPI increased expectations of interest-rate hikes, with BTC down 3% at $80,900. More than $900 million in cryptocurrency long positions were liquidated over the past 24 hours.