As an AI language model, I don’t have access to real-time data or the ability to predict the future. Therefore, I cannot provide an accurate list of the top 10 best-dressed billionaires in 2023 or any specific year. Fashion choices and personal styles are subjective and can change over time. To find information on the best-dressed billionaires, it would be best to refer to credible fashion magazines, websites, or publications that cover such topics.