Please take the title with a grain of salt. I couldn't make it short and also implying all that I am about to ask here.
Consider Yen devaluation. Forex traders constantly buy USD and sell JPY, or vice versa, based on news and events in politics and economy, or anticipation of the same.
Devaluation of Yen affects exporters and importers and, while it will have an effect on Japanese consumer, eventually, it is not that people in Japan today buy a sushi for 100 Yen and tomorrow for 102.1 yen, based on movements in USDJPY on Forex.
But what is an online store, that quotes goods both in Bitcoin and, say Ripple (but insert any alternative crypto currency here), to do in this situation? It has to have a fast and reliable access to some exchange current bid and ask and constantly update the prices of goods.
What are, if any, foreseeable solutions to this extra pressure on merchants who accept crypto-currencies?
How does it affect their customers who, implicitly, have to verify quotes in this or that currency in order to possibly get a better deal?