We'll likely have a mostly cashless society, but that doesn't mean anything for Bitcoin. Digital cash denominated in US dollars will rule the US economy, as it currently does, and Bitcoin will not meaningfully penetrate into day-to-day commerce or business transactions. Compared to digital cash, Bitcoin is clunky, slow, and needlessly complicated.  Centralization is not nearly the problem Bitcoin proponents want to make it out to be. Everyone hates PayPal, but PayPal works exceedingly well and Bitcoin really can't touch it because most people want a centralized authority they can trust manning transactions in case the other party commits fraud or acts illegally. A trustworthy central authority (the payment middleman, like PayPal, MC, Visa, etc.) is far superior to a decentralized system where payments can't be reversed in cases of fraud.