I would start by just listing verified coins with their name, and display the total number of user-created coins as a number only.
This will eliminate the coins that are created “just for fun/testing”. It will also prevent people from creating coins just to have their name displayed. And may well be an incentive for people who created a coin but did start their project yet, to start working on it.
Will have to see how much information is left after that to propose ideas on how to visualize it.