Cool. I've always wanted to fall in love with a trading game, but never found one to fall in love with, so go for it. It would be easy to try and add bells and whistles and quickly get overwhelmed. Instead, remember minimum viable product. I recently watched "subnautica post mortem" on youtube and found the business advice invaluable. I'm new to game dev, but I'm a writer and understand the concept of a highly competitive market. Find the things that make your product completely unique and see if people like it. Any way, let me know if you make significant changes and I'll do some more play testing for you.