Can't someone build a portfolio by doing demo trading
Usually, a demo trade is not a genuine trade. So the genuity will not be there. For me, I won't like to follow someone's demo trade.
There is difference between a demo trade and live trade, at least seriousness is part of it.
Don't worry, you will not be following demo trades. The toplists are based on verified trades.
You can view a persons "demo" trades as well but filter them out if you want to and the performance on users is purely based on verified Transactions.