Moentum cryptocurrency as well as U.S. dollars will be accepted as payment for services offered from these exchanges. However, when Moentum cryptocurrency is used to purchase services, the price will be reduced by 10% for the life of both exchanges. Considering in Year 3 the U.S. Stock Exchange alone anticipates annual revenues of U.S. $2.5 billion, the result will be a constant demand for Moentum’s cryptocurrency.
Yes, either exchange can sell the cryptocurrency once it is received by their customers. However, it will be in their interests to sell the least amount possible to protect and grow the cryptocurrency's market capitalization, because the cryptocurrency is held on their balance sheets.
The economics are similar to stocks of the great internet companies. It is not in the interests of the founders of these companies to dump their stocks, even though they hold vast amounts of them, because selling reduces share prices and depresses their net worth.