The $500 Ford finds in his pocket would be equivalent to about $9,437 in 2021.
The genre of this movie is: crime, drama and mystery but the remake of 1949 where the plot is almost the same the genre is: crime, drama and noir film.
Why noir? Just because it was made after 1940? The plot is the same, there's a movie made in 1928, Underworld and it is credited as noir movie.