On my candy wrappers (my currency) will want to change their values the one who then wants to buy from me what I will sell for their currency. This scheme is obviously inconvenient. Therefore, this scheme will introduce a decentralized or multi-intermediary-exchanger, within which one currency will be transparently changed to another and thus the final counterparties will use the currencies that they want. Issuers of their currencies will use their currencies in these transactions. Of course, they will ensure their own value by supplying their "assets" (goods, services) to the market and accepting their currency as payment. (From exchangers as their buyers, we remember, will use that currency which is pleasant to them.)