Where can I purchase ordinals?

I'm curious to know, where exactly can one purchase ordinals in the cryptocurrency and finance realm? With the rapidly evolving nature of this industry, it's crucial to stay informed on the latest avenues for acquiring such assets. Are there specific exchanges or platforms that cater specifically to the trading of ordinals, or are they more widely available through mainstream cryptocurrency exchanges? Additionally, are there any key considerations or safety measures one should take into account before making such a purchase? Clarifying these details would greatly assist in navigating the world of ordinal purchases.