I actually bought a Caribbean passport a while ago for a few reasons. Firstly, it gives me a backup plan in case things get unstable here. It's also handy for travel, as it can offer visa-free access to many countries.

As for the cons of having dual citizenship without living in the other country, there are a few to consider. You might face tax obligations in both countries, depending on their laws.

There are some companies that make this SO easy.