Your compensation could change because of market forces, modern salaries are a product of supply and demand. Previously both supply and demand for high paying jobs was restricted to relatively small geographic areas. Now that remote working is in the supply can move out of high cost areas. However, the converse is also true, the demand can reach people who were not previously eligible. Some of those people would be happy with a significantly lower compensation package.

So to summarize, your compensation could decrease because there are now a lot more people competing for your job. Or it could increase because there are a lot more companies competing for your services.