Where can I buy polymath coins?

As a cryptocurrency enthusiast, I'm always on the lookout for new and promising projects. Polymath has been gaining significant traction in the blockchain space, and I'm keen to explore its potential. Could you assist me in locating the most secure and reliable platforms to purchase Polymath coins? It's essential for me to ensure that my investment is safe and that I'm dealing with a trusted exchange. Additionally, I'd appreciate any advice on the best practices for storing and managing my Polymath holdings securely. Thank you for your assistance in this matter.