https://bitcointalksearch.org/topic/m.11565482
If you have more fund, I think it will safe
I had experienced up to 20+ red strikes in 999dice.
Well taking in count that 999dice is a scam you could get worse things there, 30+ loss streaks have been reported, not much more tho since any dice site has a profit limit so you wont be able to double at some point and even if you could to be able to sustain a 40 loss streak you would need way too many bitcoins its not possible, theoretically someone would get 40 loss streak if he plays long enough but in real life its most likely not happening.
yes i have experienced it, too long to play does make us lose everything almost on all sites dice so indeed many people who say 999dice scam, but I like the features in 999dice very smooth and fast