I'm a huge fan of using it as an ice breaker if you're meeting new people. It's a fairly social game, with "low-stakes" negotiations on the table, so I think it's a great way to see how's people think, interact, and cooperate (or not haha).
I love how different it can be depending on the audience. My partner's family is... almost too wholesome? They help each other out a lot lol. My tech & numbers friends are fiercely competitive in their trading lmao.
Let me know if you have any questions about it!
Edit: If you have a set that includes "3rd Bean Field" cards, just ignore 'em. Later editions removed them because statistically they're almost always a bad idea, so they're really just a trap lol.
One thing that I find interesting about Bohnanza is how the question "what is the current market value" isn't always "what am I getting for it" (as in receiving a bean card) and that changes by player count and groups to encompass "sometimes I'm getting out of a jam." For example, at 3p, I'm more likely to find that I have to offer something else out of my hand (and I would argue, for flow purposes, probably have an incentive to) to sweeten the deal, or even just give it away and offer something to get someone to take it. That leverage fades as you add more players to the point where at 7p, I find it's more of an auction as there are multiple people interested in the beans on offer courtesy of so many fields being in the game.
I have played this, it was a lot of fun with three players. This is one of the first (or even the first) game from Uwe Rosenberg. He is well known for some other great boardgames like Agricola, Patchwork and Feast for Odin.