The appeal is that it can make trading less capital intensive. In derivatives, it’s typical to make traders post collateral to back transactions, given the greater risk. With portfolio margining, holdings throughout their portfolio are taken into consideration when calculating how much margin they have to post, often significantly cutting collateral requirements. Money that would’ve otherwise been locked up as collateral can instead be deployed elsewhere.
Source: https://www.coindesk.com/business/2022/08/08/crypto-options-trading-on-solana-has-mostly-fizzled-a-new-dex-has-a-plan-to-change-that/?utm_medium=referral&utm_source=rss&utm_campaign=headlines