Speculative investing in mutual-credit-economies

How does speculative investing in mutual-credit-economies work? Imagine you want to launch an application that leverages a mutual-credit-economy backed by capability tokens. Can someone choose to invest speculatively in the mutual-credits in a way that it can be mapped to both use in the application the mutual-credits apply to and USD (for example)?

What do you mean by “backed by capability tokens”?

Using capability tokens as a sort of proxy for interaction loops.