Exactly, and why you should diversify outside of it =) Like for instance, in the gambling space there are some independent casinos taking bankroll investments you can take a look at: Just-Dice, BitDice.me and SafeDice. In pure bitcoin, bitfinex offers some pretty cool swap deals. (None of these I am associated with, or have inside information). In fact, bitcoin itself is a hugely speculative investment so don't feel bad about just leaving it sit in cold storage somewhere. And there's a huge amount of opportunities in the fiat world to. But the real litmus test for any investment should be if you think it'll be +EV, and if you are ok with losing the entire thing.
Well thats definitely true , but I feel despite all these limitations, there are things that site operators can do to safeguard the funds of the investors. Multisign which I believe is offered by moneypot(according to a post above) is one of them . I have never seen any of the sites take that extra step to do something that would assure the safety of the funds.
