IMO PTS is a VERY high risk investment even comparing to other altcoins, because a much higher percentage of PTS value is based on future promises.
But they are really good promises.
Why? There is a baseline already as just another alt-coin: it can't fall further than that, can it?
Protoshare is heavily inflated because of the promises associated with it. That's why its market cap got so high in such a short amount of time. If those promises fall through, then PTS' floor will fall to that of any other altcoin that isn't heavily watched.
By investing in PTS you're betting that Invictus will launch their products, and that their products will work and become successful.