Because Trak token is an utility which can be used for various services on the TrakInvest platform such as certification, data ownership, reputation system etc. You can get further detail of the utilities of the token in the Tokenomics section of the whitepaper: https://trakinvest.ai/files/ti-whitepaper.pdf
Further when the tokens will be taken into exchange, these tokens can be used for trading as 1Trak token =0.0007042254 ETH currently.

   So, To know how it works! visit: http://www.trakinvest.com/#ti-how-it-works
         Get started by signing up at: https://app.trakinvest.com/signUp
         Get overall information about TrakInvest and it's ICO at: https://trakinvest.ai/