Hey, guys! We have an idea to create a cryptocurrency without any fee, and we are planning to earn money on premium accounts. We want to limit the volume of daily trades on a free subscription but that it would be adequate. And premium subscriptions would be bought by experienced traders. Please, tell us , what is the appropriate limit for this? Or if you have any ideas, what other nice features can be shipped in a premium subscription, share these ideas with us, please! Thanks a lot!