The total open interest on all Bitcoin futures has reached a new all-time high (ATH), according to data from skew.Futures contracts exist when investors purchase the right to either buy or sell units of an asset at a later date with a fixed price. The concept allows for the prediction of future pricing and rewards for that pricing without actually owning the underlying asset.
All future contracts exist between a buyer and seller as an agreement to purchase at a later time. Open interest in those contracts reflects the total number of contracts that have not been concluded with a sale.
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https://beincrypto.com/total-open-interest-in-bitcoin-futures-hits-ath-but-does-it-matter/