Given the monetary policy Satoshi chose and the headline he picked to include in the genesis block, I really don't think you can infer what he himself thought bitcoin was meant to become, even if he referred to it as cash originally.
Beyond that I don't see how it matters what something was designed to do or what early adopters personally used it for or thought it was meant to be used for. The only relevance for a technology is what it's actually adopted for over time and the total addressable market cap for a store of value being 100x + of that of a medium of exchange, it makes perfect sense to me that that's the feature the market converged to by far as reflected amongst other things by the relative prices between current btc and bch...
Beyond that I don't see how it matters what something was designed to do or what early adopters personally used it for or thought it was meant to be used for. The only relevance for a technology is what it's actually adopted for over time and the total addressable market cap for a store of value being 100x + of that of a medium of exchange, it makes perfect sense to me that that's the feature the market converged to by far as reflected amongst other things by the relative prices between current btc and bch...