Problem scenario
You want to buy DDX (DerivaDAO). You want to know if you can put it on a Trezor device. Can a Trezor Wallet support DDX?
Answer
You cannot buy or sell it, but you can send and receive.
If you use Trezor DDX can be sent and received with four models of Trezors: a Safe 5, Safe 3, One and Model T.
Go to https://trezor.io/coins, and search for "ddx" in the search bar in the middle of the screen near the top.