Can BNB only be bought on Binance?

Excuse me, I've been hearing a lot about BNB recently and I'm quite interested in investing in it. However, I'm a bit confused about the purchase process. Is it true that BNB can only be bought on Binance? Or are there other platforms or exchanges where I can acquire it as well? I'd like to know if I have more options when it comes to purchasing BNB, and if so, which ones are the most reliable and secure? Additionally, are there any specific steps or considerations I should take into account when buying BNB, regardless of the platform I choose? Thank you for your help in clarifying this matter.