There's not a lot of depth in The Firm but I don't think there has to be. Ultimately it's just a quick reaction game but it's a pretty good one. And there are some cumulative progression goals to reach to help give the game some long-form structure. If you enjoy this kind of game, then this one is not a bad choice. At the very least it has a novel premise.
I think I might try this. I hate how much I suck at the GTA V stock market.
Go for it! I can't speak to the GTA V stock market but I'm pretty sure this is how the real one works 
Actually, GTA V is also pretty close and you're reading news stories to make decisions there too. I just get greedy and don't sell soon enough.
Sounds pretty boring. It baffled me when HAL released Wall Street Kid on the NES.
I've never played Wall Street Kid (it does sound dry) but this is just window dressing on a fun little game.

