Can you still buy Doge 20?

Could you please clarify something for me? I've been hearing a lot about Dogecoin lately, and I'm curious about its different versions. Specifically, I'm wondering if it's still possible to purchase Doge 20? I've searched online but the information seems to be quite scattered. Could you tell me if this particular version of Dogecoin is still available for purchase, and if so, where I might be able to find it? I'm also interested in knowing if there are any special considerations or risks I should be aware of before making such a purchase. Thank you for your help!