There are two main reasons behind the wallet separation between Pro Spot and Pro Futures.
Different Risk Profiles: Spot trading involves the immediate exchange of assets, while futures trading involves contracts that may be settled at a future date, often with leverage. Futures trading inherently carries more risk due to the use of leverage, which can amplify both gains and losses. By separating accounts, exchanges help traders manage and isolate the risks associated with each type of trading.
Margin Requirements: Futures trading typically requires the use of margin (collateral), whereas spot trading does not. Keeping these accounts separate ensures that the margin requirements for futures are maintained independently, preventing the commingling of funds and potential margin calls affecting spot holdings.