All traders want to always buy Bitcoin at a price cheaper than the market price. Apart from buying and selling on the ordinary, centralized crypto asset exchange, there is another option, namely a peer-to-peer exchange. In this exchange, asset prices are not “regulated” by the exchange manager, but directly by the users. In principle, a peer-to-peer (P2P) exchange is a crypto asset exchange that is similar to an online shop, aka a marketplace. The role of the stock exchange manager is only to bring together the seller and buyer of assets directly on one platform. In other words, for example, if you want to sell Bitcoin, you have a trading booth on that platform. It is also possible to place ads on that platform by specifying the selling price of the asset. The advantage of an exchange like this is that the seller is free to determine the selling price as he wishes and the buyer can freely look for price variations on the exchange. Buyers can even get a much cheaper price than buying on a regular exchange.
The reason i seen that makes traders to look for a cheaper rate btc to buy is because traders never believe that then will make benefit for their transaction, the problem is that people will still sell to them at a cheaper rate because them know them but it's difficult for ordinary person to buy btc at lower rate.
Even some platform's will even loan their btc to traders in order to make profit,using bank as a reference,it's very difficult for bank to loan individuals, most especially youth's who want to startup a business but bank will invest peoples money into forex trade.