The Hidden Leverage of Open Interest in Crypto

Open interest in crypto is a critical metric that helps analyze market sentiment and predict price movements. It measures the number of futures trades that are still active and the amount of money at stake. Investors look at open interest to determine whether a move is being supported or if it's a speculative move on borrowed capital.

The figure changes when trades open or close. A buyer and a seller start a new trade, and it goes up by one. They both close an old trade, and it goes down by one. One trader hands a position to another, and the total stays the same. So open interest gives a clear look at how much borrowed money sits in the market.

Bitcoin futures open interest peaked above $90 billion in early October 2025, when Bitcoin traded near $126,000. By May 31, 2026, it had dropped to about $42.6 billion. This fall shows how fast risk can leave the market.

Traders use open interest next to the price to understand markets. Rising open interest means new money is coming in. Falling open interest means positions are closing. With funding rates added, it also hints at which side is crowded.