Property tokens are ERC20 compliant, so users can trade them against any other digital assets that they want. It will also depends on the platform or exchange that is listing our property tokens.
On our part we will value the property tokens in DGX, this is to give an indication of the intrinsic value of the tokens.
REI token acts as our membership token, with utilities and benefits. For example we built in transaction fees whenever property tokens are transacted. These fees will be accumulated and will find its way to benefit REI token holders. We will be releasing details on this soon.
Hope this helps!