Poker books give you the path to theory, that is, to the correct game. The size of your bankroll should be according to your game, if you play tournaments, and are a regular player you can have an average of 10 to 20 times the buy-in value, but if you play cash game you can have an average of 3 to 5 times the buy-in.
Of course, in cash games, the chance of you leaving zero is very high with little buy-in.
Under these conditions the size of your bankroll is the size of your poker experience and skill, you can play a tournament that costs $ 10500 and have only $ 10500, you can win the tournament and become a millionaire or lose and be left with nothing, the decision is yours .
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