Seems like dynamic house edge isn't that
Safe. Damnnn. Total invested amount from
BTC150 to
BTC35. There goes my holiday funds.

Sweet Jesus! That's one epic mistake (2% instead of 2x).
Let's see what the site owner will do. He must have a thought in a back of his head just to say 'f**k this' and disappear with funds. But if he lets the player withdraw without hassle, that would give SD a lot of reputation/credibility points. Although they probably should think about capping the max profit at some reasonable level to avoid things like that in the future.
The public cold wallets never 100% covered the site bankroll to begin with so it was always assumed the difference were in hot wallets for quick processing. So if the site wasn't insolvent before, they wouldn't be now. Nothing has changed.
...
Yes. The only thing in question is how much is in hot wallet(s).
Remember that the max profit is set by the investors and how much they risk. One thing that bothers me is that even if everyone on the site had their risk set to 10 kelly, max bet should not have been this high.
Feel free to correct me if I'm wrong, but 10 kelly means I'm willing to risk 10% of my bankroll on a single bet. So how was it possible that the max profit was nearly 95% of the actual bankroll? there might be some trickery with the variable edge at play here that i'm forgetting about