I think all gamblers who have played luck-based casino games have already fallen to this fallacy a number of times. The reason is simple. In a coin flip, although it is possible that heads will turn out each time, is it likely that there will be 20 consecutive flips with heads as a result? It is probably less likely. The same logic applies to dice, roulette, baccarat, and other random casino games. Each game may be completely independent from each other but the possibility that only one result shows up every time is very low.
This game is based on the luck. That make gamblers difficult to win because that will depend on our luck. A coin flip will not give us win many times because we never know what face of the coin will show up to us. But many gamblers don't realize that when they play this coin flip, their chance to win will not too big, same as the other gambling games based on the luck. When they lose, their mind will think that they can win in the next rounds but that will not happen easily.