The problem is when you invest in an ICO like betking, your investment, to me is more risky because it's going to rise and fall based on speculation. Investing in a bankroll on the other hand (e.g. Safedice, Yolodice, Crypto-Games) is safer because there's no bs; if gamblers are losing, you make money. Income is more stable and reliable.
I think investment in various sectors must have its own risk. like the example that when we invest in bankroll then the risk is too big, could be all the bitcoin that we have stolen and taken away by the owner of the site. so that must be considered in making investment is the security and also the credibility of the place that we will invest. this will make us comfortable in doing various investment actions.
You just represented the main risk of putting your money at 3rd party site.
I mean, if you store your funds in an exchange, as a large amount of people do(which I don't agree is a good thing), you are taking the risk that the exchange will be seized or closed up , with all of your funds.
Storing bitcoin in a 3rd party site is against the main ideology of bitcoin.