Where can I buy Sentinel coins?

Excuse me, could you please clarify where exactly one might go to purchase Sentinel coins? I've been interested in investing in this particular cryptocurrency but I'm not sure of the best platforms or exchanges to use. Is there a specific marketplace that you would recommend for acquiring Sentinel coins, or are there multiple options available? Additionally, would you be able to provide any insights into the security measures that should be taken when making such a transaction to ensure the safety of my funds? Thank you for your time and assistance.