What about predicting bitcoin price and other predictions like gold, ethereum, solana, crude oil and similar ones? I do not see any good reason their workers should not bet on some assets that their workers can not manipulate. I prefer to bet on sports on gambling sites, but I visited prediction market because I want to bet on bitcoin price.
You are not an employee of Goldman Sachs, so you're free. A quick search with Meta AI on the nature of services Goldman Sachs provides, I see this
Goldman Sachs is a leading global financial institution that provides investment banking, securities, asset and wealth management, and platform solutions. Founded in 1869 and headquartered in New York, it serves corporations, financial institutions, governments, and high-net-worth individuals worldwide.
They do investment banking and manage portfolios of high net worth individuals, so they can have a good deal of insider information if a whale wants to manipulate gold, bitcoin or any of these investment vehicles by where funds are flowing into, so I don't blame the company from placing the ban.