Next project doubt

I think I have 2 options for my next project , either build something like my passion project to showcase my skills or build a project that solves a real problem but I won’t be able to show my skills as much as the latter .. which do you think should be more impactful and good for portfolio(Rl-project) and tbh I can only create a protype I was thinking some rl project for my college .. or do something cool