OK a POSSIBLE plot hole

Marcos is not only working in the street for petty cash, that is his entrance for his real thing: screwing up people, more specifically: partners. At the beginning he says "I don't work alone, I need a partnet always..." which he needs given the "dissapereance" of "el turco" (who was also on the con), throughout the movie we meet a lot of his ex partners: Sandler, the guy from the bank, and Valeria says to Juan "don't you know how all of Marcos's partners end up"? meaning that Marcos has ALWAYS screwed up his partners, that is what he does, that's his job and at the end of the movie he tried to do it to Juan with the "castrito" scene "you said check!". So, in all, he is not on the streets for petty cash, from the beginning he wanted to become friends with Juan so he will eventually steal from him. That's what he does, 2 things, he does it because he loves it, even if he already has a lot of money, second, you don't screw up partners for petty cash, you do it for a lot, in Juan's case that would have been 50k. But ultimately it is clear that to marcos it is all a game and he loves playing that game. And yes he said "I don't want to use the inheritance money until the matter cools off" in the meantime he still looks for more "new partners" to scam...

Is a masterpiece, but there is actually a plot hole, if you are interested, I will tell you...