This token represents what is essentially a decentralized trading platform. The Dynamic Trading Rights investment platform will allow traders to make transparent and safe trades. They can do so by using these tokens as currency to perform their trades.
However, they also state that these tokens are not needed, and the traders will instead be charged a fee in the currency they are trading. The information is a tad conflicting, and by their own given example, the tokens for this ICO don't seem to have much in the way of usefulness other than to provide funding to the startup in question.
While I do believe decentralized exchanges will be a big part of the future of cryptocurrency, I also think that DTR is rather late to the party. They do not yet have a working product, and that puts other exchanges that have already been functioning for sometime way ahead of them. The platform also doesn't seem to have plans to do anything particularly groundbreaking, and I'd be more inclined to invest in competitors who already have working platforms in place.
You can buy Dynamic Trading Rights on just one exchange as of now. This is a smaller, lesser-known exchange, and while that should not necessarily discourage you from making a purchase, you should be sure to immediately transfer anything you buy here to a wallet in your possession. It's possible for exchanges like these to go under without notice, taking your hard money with them in the process.
This is an ERC20 token. What this means is that you can store your investment in any wallet that accepts Ethereum assets. The number of wallet options for tokens of this type makes it very convenient for investors to store their tokens safely. You could consider utilizing My Ether Wallet, Coinomi for Android or iOs, or a Trezor hardware option for cold storage to achieve this goal.