Steven, it depends on what your business model is.
An MVP is a learning instrument, a minimal version of your product that provides some amount of real value for real customers. If you plan to raise money, you will almost certainly need to show traction. It's unlikely you will get funding, even angels, without a demonstrable revenue or growth display. An MVP will help illustrate that model.
But of course you're going to have to get it built somehow. You can't really start with zero upfront cash investment of your own.
Have you validated that your idea targets a real pain in a sizable reachable market? Have you done customer interviews? Do you really know what to build? That's what I'd be wondering before making an MVP at all.