Imagine your scientists have found a way to increase the space of your empire, literally: They are able to create an artificial inflaton field which locally creates a "space bubble" connected with usual space by a wormhole. In other words, from outside it takes just the space of, say, a star, but it's bigger on the inside. OK, so you now can have some extra empty space. But now the emperor wants to know if this invention has an actual use, or if he just wasted his money on that research.

So in short: Is there anything interesting (from the point of view of an empire) which you could do with such a space bubble?

Imagine your scientists have found a way to increase the space of your empire, literally: They are able to create an artificial inflaton field which locally creates a "space bubble" connected with usual space by a wormhole. In other words, from outside it takes just the space of, say, a star, but it's bigger on the inside. OK, so you now can have some extra empty space. But now the emperor wants to know if this invention has an actual use, or if he just wasted his money on that research.

So in short: Is there anything interesting (from the point of view of an empire) which you could do with such a space bubble?

Edit: I want to emphasize that my empire is a space empire, and the space bubble is in space, not on earth. Although the mention of star-sized wormhole in principle already implies that, I notice that I was probably not clear enough about that point.