Open interest in altcoin perpetual futures has surpassed Bitcoin‘s for the first time since December 2024, marking a significant shift in leveraged positioning as traders move further along the cryptocurrency risk curve. Coinalyze data showed Bitcoin perpetual open interest at approximately $23.9 billion on September 7, accounting for about 37% of perpetual-futures open interest tracked by the platform.
That leaves the combined altcoin market with a larger share than Bitcoin, although the comparison aggregates positions across Ether, Solana, XRP, BNB, Zcash and numerous smaller cryptocurrencies against Bitcoin alone. Including dated futures, Bitcoin’s total open interest stood near $25 billion.
The crossover comes as Bitcoin trades around $80,000 while smaller cryptocurrencies have recorded stronger gains. Market capitalization for altcoins outside the ten largest crypto assets has risen more than 10% since the beginning of September, moving above $200 billion.
Zcash Leads Expansion in Altcoin Leverage
Zcash has provided one of the clearest examples of the shift toward leveraged altcoin exposure. ZEC futures open interest climbed to roughly $2.4 billion in early September as the privacy-focused cryptocurrency broke above $1,000. The move triggered more than $34 million in short liquidations as bearish positions were forcibly closed during the rally.
Other major altcoins have also attracted increased derivatives activity as Bitcoin dominance retreats from recent highs. However, rising open interest does not necessarily mean traders are collectively bullish. Every derivatives contract contains both a long and short position. Open interest measures the value of contracts that remain outstanding, making it primarily an indicator of market participation and leverage rather than directional conviction.
Funding rates, spot-market volume and liquidation data are therefore needed to determine whether positioning is becoming disproportionately long or short. Dollar-denominated open interest can also rise simply because the underlying cryptocurrency appreciates, even without an equivalent increase in the number of contracts.
The previous crossover in December 2024 provides a notable comparison. During that period, Bitcoin approached $108,000 while leveraged altcoin positioning expanded rapidly. Altcoin open interest relative to market capitalization reportedly increased from 3.57% to 4.42% before a wave of liquidations drove the ratio back toward 3.96%.
More than $12.8 billion of altcoin open interest was erased during the subsequent deleveraging, while a December 9 selloff generated more than $1.5 billion in market-wide liquidations, heavily concentrated among long positions. That history does not establish that the current crossover will produce another correction.
Market structure, liquidity and positioning have changed considerably since 2024, and September’s increase in altcoin derivatives exposure has occurred alongside rising spot valuations. Nevertheless, leveraged positioning can amplify volatility in both directions.
If prices continue rising, short liquidations can create forced buying that accelerates rallies. A reversal can produce the opposite effect as leveraged longs are automatically closed, particularly in altcoins with thinner order books. Bitcoin also remains the largest individual cryptocurrency derivatives market by a substantial margin.
The significance of the latest crossover is therefore not that Bitcoin has lost its position as the dominant single derivatives asset, but that speculative exposure across the rest of the crypto market has collectively become larger. Whether that marks the beginning of a sustained altcoin cycle will depend increasingly on whether spot demand can keep pace with the leverage now accumulating in perpetual futures.