It could but it will never happen because there is always a limit to the bets. So you might be thinking what if a "Whale" decides to play a game where he/she can bet up to $100k per bet yet the minimum is $5 even though it would be unlikely the "whale" would bet it. Lets just say this whale decides to do this and doubles the bet if he/she loses etc. etc. When the whale loses 15 times in a row he/she won't be able to double up anymore. Not to mention the casino would know what is going on. Now playing a casino game that is 49.50/50.50 BJ for example it would take about 35k hands to run into a 15 hand losing streak. Of course this will happen sooner or later but that is why the limits are set so you can't double up more than 6 or 7 times which will happen a lot more.