Can you buy and sell in MetaMask?

Hello there, I'm curious about the capabilities of MetaMask. Can you actually buy and sell cryptocurrencies directly through the platform, or does it primarily serve as a wallet and transaction facilitator? It's important for me to understand the full range of functionality MetaMask offers before deciding whether to integrate it into my crypto portfolio management strategy. Clarifying this point would greatly assist me in making an informed decision. Thank you for your time and expertise in this matter.