How is a decentralized marketplace possible? I mean I know it’s possible if the product your are buying is in the hands of just another person but I don’t think we can buy directly from a factory or wherever a product is being sold. Some products are manufactured and aren’t really interested in the merchandise aspect making it necessary for third parties to come and handle that side of business.

It’s definitely a factor, but not really. It’s simply the fact that usage has always been really small, and people are simply just using the likes of eBay instead. Truth be told, bitcoin and cryptocurrencies are mostly held as investments today, rather than for payments.