30 loses in a row is 1 in a billion chance, there are reports of a little bit more but not much more since no one would have enough bankroll to sustain more than 40 loses in a row even if you start with 1 satoshi bet
So how safe would you be by using enough funds to ensure you can do 30 rolls or a little over? I hit a little over 20 losses in a row a few times back when I first got into bitcoin and was using the dice sites. I won quite a bit using martin gale but then kept going and lost so then I quit haha.
You need about 10 BTC to be able to survive the 30th consecutive loss if you started with 1 satoshi bet. The problem with starting with such a low bettig amount is that you need to bet a lot and i mean A LOT, for example in order to have a profit of 0.01 btc you would need 2 million bets wich is insane