The price of DOT is determined by the market. As the demand to buy Polkadot increases compared to the volume being sold, the price will increase. If demand falls compared to supply, the price will fall.
Many traders pay close attention to the market, trading the price movements when they spot a trading opportunity. In contrast, trading isn't for everyone. Some investors don't watch the market closely or trade on the platform every day. Instead, they make a Polkadot purchase to hold as a long term investment.
Overall, the price of Polkadot is determined by the supply and demand dynamics of all traders and investors. The price you see on our exchange is constantly updated and our low fees mean that you can get the most Polkadot tokens possible for your purchase.