You have made 16 posts. If you want to change your display name, I would recommend that you create a new account. In order to have permissions to change your display name, you need to be a VIP account, and in order to get a VIP account, you need to donate 50BTC, or about $2.6 million at current prices (when this was first offered the price of bitcoin was much lower). Sometimes the forum administration will change your display name at the request of a forum member if they have a compelling reason. I believe that in the past, compelling reasons would include being potentially doxed based on your current display name, being a prominent forum member, making substantial contributions to the community, and similar.