Solana Begins Testing on Major Speed Upgrade: SOL Price to $150?

Solana has deployed the Alpenglow upgrade to its public testnet, aiming to reduce transaction finality from 13 seconds to 0.15 seconds by replacing the TowerBFT consensus with the Votor protocol. Validators can now test the migration using Agave 4.3, with mainnet activation targeted for around September 28. Meanwhile, spot Solana ETFs recorded $26.1 million in net inflows on September 21, bringing cumulative inflows to $1.44 billion. SOL is currently testing a resistance band between $116 and $123.35, with analysts watching for a potential breakout toward $137.65.