What is the relationship between the Komodo coin and the decentralized exchange?
Or in other words - what will determine the demand for KMD?

Why does/would one of those things have to do with the other? Komodo creates the demand for Komodo, with or without BarterDEX even existing.
I believe in barterDEX. But why should I buy coins KMD if they do not have a connection with the exchange?
Many investors are interested in this questions.