it doesn't need an account and would probably be a good fit for those instead.

Actually, having a quick think about it, indeed this would be a better option for an investor. Not only is there privacy, but they do not have to get involved in anyway with the social aspects of the platform - and perhaps that separation allows for more speculative behavior minus any emotional attachment. I know that for me, one of the aspects that changes my behavior with Steem is that I am public and looking long, trading Steem is different to trading any other coin I hold. Not great for a trading frame perhaps...