Aggregate open interest in altcoin perpetual futures surpassed Bitcoin's for the first time since December 2024 on Sept. 6, according to Coinalyze data. Bitcoin perpetual open interest remained near $23.9 billion, representing roughly 37% of aggregate tracked positions, while Bitcoin's total open interest stood near $25 billion on Sept. 7. The crossover reflects increased leveraged trading as Zcash and the wider altcoin market rallied, but it does not by itself show whether positioning is bullish or bearish.
Zcash became one of the clearest drivers of the derivatives expansion. ZEC futures open interest climbed to approximately $2.3 billion to $2.4 billion as the privacy token moved above $1,000 in early September. ZEC rose about 20% on Sept. 4 and reached an intraday high near $1,023, liquidating roughly $36.6 million in leveraged positions, including about $34.5 million held by short sellers. By Sept. 7, ZEC traded near $1,192, up approximately 11% during the session.
The rally coincided with Zcash becoming the first privacy coin with a U.S. spot ETF after Grayscale converted its Zcash Trust into the ZCSH exchange-traded fund on NYSE Arca in August. The fund launched with approximately $304 million under management and later passed $414 million as ZEC prices and investor interest increased. Short liquidations also accelerated the move, as forced buying helped push prices higher during the breakout.
Broader altcoin spot valuations also increased. The market capitalization of altcoins outside the ten largest crypto assets rose above $200 billion during early September, gaining more than 10% from the beginning of the month. Bitcoin, meanwhile, traded near $79,575 on Sept. 7, down approximately 0.4%, with an intraday range from roughly $79,460 to $80,494. The combination of stable Bitcoin prices and stronger altcoin gains is consistent with traders accepting more risk.
Elevated open interest can become dangerous when leveraged positions grow faster than available liquidity. Long liquidations add forced selling during a decline, while short liquidations create forced buying during a rally. The previous altcoin open interest crossover in December 2024 was followed by corrections across several mid-cap tokens, but the article notes that one historical occurrence does not establish a reliable predictive relationship. The most useful signals now include funding rates, spot trading volume, and changes in open interest.
