Indeed, 'Den of Thieves' is based on a true story. In real life, there are groups of criminals who target banks and financial institutions, much like in the movie. The movie may have been inspired by real bank heist cases where the thieves had to outwit the security systems and the police. It also might have incorporated the real - life challenges and strategies that both the criminals and the law enforcement face in such situations.
Yes, it is based on a true story. The real - life basis might involve the complex relationships between thieves, the police, and the underworld. There could have been real - life counterparts to the characters in the movie, who were involved in a cat - and - mouse game of planning and preventing robberies. It gives a fictionalized look into what could have been a very dangerous and high - risk world of crime.