Neither was Henry Hill but made a movie about his mob exploits, neither was Meyer Lansky and was deeply connected to the mob, the part of Hyman Roth was loosely based on Lansky
I remember reading that Lansky had met “Lucky” Luciano when they were both youngsters. Seems Lansky taught Luciano about earning and Luciano kept others from beating up the smaller Lansky.
Maybe true.... maybe not.
But Lansky DID know finances. Without Lansky Luciano would have never been able to modernize the mob.