The good stuff
The movie's messages are timeless -- that money can make you temporarily happy, but in the end it's your family that is most important. If you have money and power, but no one to love -- no one who even cares enough about you to pick you up from prison -- then your priorities aren't in order.
Gordon Gekko seems like a reformed man who can predict the economic crisis but isn't powerful enough to do anything about it. He's still a compelling character, because even as a "has been" he can still see the game for what it is. Despite being a successful Wall Street money maker, Jake is quite loyal to his mentor and idealistic about the green company he champions throughout the film. Winnie is a strong role model because she sticks to her values the entire story. She doesn't use her father's money, and she doesn't "sell out" when given the chance.
What to watch out for
An elderly man jumps in front of a subway train to commit suicide.
A couple lives together and is shown kissing in bed (he's shirtless, she wears a nightdress). The couple kisses and embraces several times but is never shown having sex. Several scantily clad women are shown in a couple of nightclub scenes.
Language includes a couple of uses of "f--k," as well as "s--t," "a-s," "bi-ch," "a--hole," "d--n," "h--l," "crap," "godd--n," "oh my God," and the like.
Brands include Apple, Ducati, Bulgari, and quick shots of various high-end luxury stores and items.
Drinking, drugs, & smoking:
Lots of drinking and cigar smoking among the Wall Street brokers and executives. References to a drug overdose.