Well, Ethereum provides the most mature infrastructure and tools for building complex Dapps and has a strong community of developers working to continually improve the ecosystem. The TravelerToken will not always run on top of Ethereum; it will transition to a stand-alone permissioned network. However, we will always strive to maintain interoperability with Ethereum, and other new decentralised application platforms that come along (i.e. EOS, DFinity), in order to leverage their communities and the applications built for them.