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Do you have such feeling also? Do you have a feeling that if others make large bets, that you also must bet large, otherwise you would feel like uncomfortable, or feel like a poor among rich, or something of that kind.
I advise you to be yourself in a casino environment, you don't be that random guy stealing people's characters and expect to be at your best in gambling. If you saw a guy that way today and saw another guy losing in another pattern tomorrow, would you now be switching your gambling behaviour? That is why I advise that you be yourself, it is not wise to be gambling and be tossed all around, there must be what took you to the gambling house, and before you got there, you should have had your own plan and budget you have to follow to letter and not another person's ways of gambling.
What if the guy is just so rich or reckless? What if he only had the luck this time? He might not be so lucky next time. You should always follow your thoughts and avoid other people's thoughts. I hope you never change your gambling behaviour due to this or have you? That will be so disappointing because you might eventually lose money, and lose it bigger than before if care is not taken.