As Nick Szabo observed, a good usually starts as a collectible and because of its intrinsic properties becomes good money. As this natural market progression happens there is increased desirableness, salability and monetary premium. Market participants search for a store of value, medium of exchange and unit of account.
Since their inception Bitcoin and MWC have had thriving Over-The-Counter markets. Later liquidity and price discovery begins happening on exchanges. All of this activity increases salability and volumes. These guides will help you find the MWC liquidity.