Why should I buy Polkadot?

Could you elaborate on the reasons why someone might consider investing in Polkadot? As a crypto aficionado, I'm curious about its unique selling points and how it stands out in the crowded blockchain space. Is it the interoperability features that make cross-chain communication seamless? Or perhaps the scalability aspect that promises to handle high transaction volumes efficiently? Additionally, how does its governance model contribute to its overall appeal? I'd appreciate a comprehensive yet concise overview of the benefits of investing in Polkadot.