A lot of poker beginners are falling into the trap of staying with their hand all the way to the end no matter what their card value, by thinking

 "Well, since I put money in the pot, I have to stay in now".

Now emerges the question – is it possible to win a pot by putting all our money in it? The correct answer is a – NO!

Under certain circumstance, when the pot chances give you a good reason for a "call", however, if you're already convinced that you're crushed, and there's no room for an improvement in order to have the best hand, the right thing to do is to fold immediately.

In conclusion, the money you've already put in the pot isn't yours anymore and you can't have it back just by playing a hand all the way to the end.