There are many ways players can potentially trade in the future. What would your ideal trading system look like?
For fairness' sake I'd like it if you could only trade with nearby players. Would completely defeat the point of the game if you could trade with anyone across the world like in main series Pokémon games, though I doubt Niantic would do that haha. Makes it too easy. Maybe put a daily/weekly limit on trading so people don't quickly fill their dex by trading with someone who has mostly everything already? We'd need some sort of limit at the very least or I can see this game becoming too easy for many people given that collecting's the main point.