As of today, 1 August 2023 04:00 UTC, the XBTETH perpetual swap is available to users on BitMEX. Traders can now speculate on the ratio between XBT and ETH, margined in Bitcoin, with up to 100x leverage.
You can start trading XBTETH here and read the contract specs here, or for a deeper dive into this new crypto derivatives product, and how it works, read this.
In the meantime, if you have any questions please contact Support.