Trading platforms consist of two parts: supply (sellers) and demand (buyers). To build a site, you need to combine both sides of the market. And in order to control this market, you need to have a better vision on both sides of the market than anyone else - in real time. In other words, you should see the point of view of both the buyer and the seller, and you should know, in real time, that buyers want to buy and what sellers want to sell (and at what price).
Creating and managing a trading platform is a very difficult task.
Fortunately, mobile Internet makes it much, much easier. The almost universal penetration of mobile devices today allows you to "connect" both sides of the market much faster and cheaper than ever before, and then, in real time, control the supply of this market and the dynamics of demand.
My partners and I really believe in the business model of trading platforms, Everything is just beginning, and we continue to look.
The best way to create new markets (or redesign the old ones) with mobile technologies will be in markets where supply is initially limited and there is no viable (comparable in price) replacement for such a proposal. Aggregate this supply and demand will follow. Mobile technology just makes it so much easier.