* Your university's policies: Many universities have restrictions on concurrent enrollment, possibly limiting you to one full-time degree or a specific combination of courses. Some might allow a limited number of concurrent programs, while others may prohibit it altogether.
* Your personal capabilities: Studying multiple degrees simultaneously requires exceptional time management, discipline, and academic aptitude. Taking on too much can lead to burnout, poor grades, and ultimately, failure in all programs.
* The nature of the degrees: Some degree programs are far more demanding than others. Combining two intensely demanding programs is far more challenging than combining a less demanding one with a more demanding one.
In short, while *technically* you might be able to register for multiple degrees, practically speaking, the number is limited by university rules and your own capacity. One or two is generally the practical maximum for most people.