Unlike traditional futures contracts, where buyers and sellers are obligated to execute the deal on a set date regardless of the current market conditions, perpetual ones don’t have an expiration period. This means that traders can hold their positions indefinitely.
Binance’s perpetual Bitcoin-priced futures, just like their previously launched quarterly counterparts, allow the leverage of up to 125x—a factor by which a margin trade’s value—as well as the risk—could be multiplied. According to the announcement, Binance’s crypto-margined quarterly and perpetual futures aim to help users further diversify their trading methods and improve margin efficiencies.
https://decrypt.co/38157/binance-launches-perpetual-futures-priced-in-bitcoin