Let's say you're working toward getting an O-1A, and you fulfill the three categories out of eight, how broad can you make the scope of work that you can do? (s

Let's say you're working toward getting an O-1A, and you fulfill the three categories out of eight, how broad can you make the scope of work that you can do? (since the category includes sciences, education, business, or athletics) For example, if you are not set on one career, and have pursued 3-4, and you get the O1 for one career (where you can show extraordinary proof), can you still do work in other areas? In other words, how broad can you define the O1 so that you could do almost any type of work as you could do with a greencard.