Hello. The event in July was presale (1 ETH = 8 million DCN), and now we are having an ICO (1 ETH = 2.5 million DCN), so that was the incentive to join the presale - you get more for your support.
The ICO price is still very low, if you read the Whitepaper you will see the fundamental price is much higher than the current ICO price. So there is an incentive tojoin the ICO.
The current rate is the ICO price, which was fixed a few months ago. It will not increase during the ICO, but after that - nobody knows what will happen. Before the ICO, Dentacoin had a much higher market price, which shows the potential ahead of Dentacoin. The ICO ends on Nov 1st, so still some time to join and buy Dentacoin cheap. The value of the token increases through the value generating tools. The first tool is already launched, the next 2 tools are on a test phase - once they are launched, more activities will be created to contribute for Dentacoin mission. Besided, many dental clinics are interested in ways to integrate Dentacoin into their workflow. The larger the network grows - the higher value it creates. "Within the network, network effects are expected where the value of the whole network increases with every new participant added to it."