Bitfinex: Bitcoin tests key support as altcoin activity surges

A Bitfinex Alpha report indicates that Bitcoin has been consolidating between $77,100 and $81,300 over the past 20 trading days, currently testing the lower bound of this range. A breakout above $81,300 could potentially drive the price toward $86,500 due to a volume vacuum. Options market activity is shifting toward the September 18 expiration ahead of the Federal Reserve's interest rate decision. Meanwhile, altcoins have shown strong performance, with all 29 major assets rising last week, led by Polkadot and Zcash.