So this main use of this coin is for transaction fee on an exchange? Is there any other possibilities of the use of this coin?
XCH primary use will be for discounts when exchanging crypto.
And, we will be purchasing XCH back from the miners/traders with 20% of our profits each year then burning the tokens. Until only 50 million XCH are in circulation.
Other uses are not scheduled. But when we're a bigger exchange we might consider asking new ICOs to pay (using XCH) to list their coins on our exchange. That's not confirmed however - for now listings are free.