SP can't be used as a currency, for obvious reasons, and, really, STEEM can't be a very good one either (due to the very high inflation rate).

So it has to stand as a sort of "stock" (obviously not a literal equivalence). You make good point about not making a profit, and indeed this is one of the real problems that some investors have with buying into STEEM/SP.

If it can't be used as a currency, and it doesn't make a profit, then why should you buy it? If you figure that out, please let investors know because most can't come up with a good reason (beyond selling to a "greater fool").