I never understood people who were against trading in POTCO, and I always always always thought it was long overdue.
You know why POTCO didn't have trading? Because it was a game marketed for children. You know who is easy to scam? Children. The only reason there was no trading in POTCO was for the players' security. I'm pretty confident if POTCO was marketed towards older players a trading system would have been implemented before it was even released!
As for TLOPO, I feel like the majority of players are more mature than what Disney had in mind for POTCO, so we should be able to handle it.
And the truth is, an economy is a massive part of any MMO. People are saying TLOPO will lose players because people will stop looting - well, there may be some truth to that but only because that's how POTCO was forced to be and we've gotten used to it.
Consider that every single top MMO ever has a very lively economy. In almost every MMO out there, and certainly all of the big name ones, trading is a huge part of the game. Without it they would die.
The only concern I have here is that the 200,000 gold cap needs to be massively increased if trading is to become a thing. Assuming gold is stored as an integer it can be increased to 2.1 billion without requiring any more space on the servers!
Also I never understood the point in a gold cap anyway. Perhaps just to stop people from racking up enough to start giving it away in poker games.