Is it possible to upgrade a project?

I’m about to start a new project that I might earn some money from. So I have one simple question: If I develop the game in Unity Personal, can I later upgrade the project to Unity PRO(Mostly to remove the “made with unity personal”. Some people don’t try games because it says that.)?
(I’m not saying that I’ll earn 100k. I’m mostly just curious.)

Yes, yes you can, it will open up options for the build after you upgrade the Unity License.