I'm a curious investor interested in the Binance Smart Chain and its BEP20 token standard. Could you please enlighten me on which cryptocurrency exchanges currently support BEP20 tokens? I've been exploring various platforms but have found the information scattered and sometimes outdated. It would be greatly appreciated if you could provide a concise list of exchanges that offer trading opportunities for BEP20-based assets, along with any additional information that may aid my research. Thank you for your assistance in navigating this ever-evolving landscape of digital currencies.