Being a small business man I have a tendency to look at things from that prospective.  Right now in retail you have the big stores -- amazon, walmart, ebay, apple, and so forth -- but with all of that there is also room for the small "mom and pop" stores and everything in-between.  I see the future of money to be the cryptocurrency and it really is the only solution to the monetary issue the governments and banks have lead us to.  

Let me explain . . . when people finally see the fiat currencies are just unbacked worthless paper their will be the rush for the trusted sources like gold and silver.  Now it is hard for a business to transact business with that -- imagine Apple trying to ship over 1 billion dollars worth of gold to China to pay for the iPhones they had them make up.  Not going to happen.  Also governments will just make laws, like they have done in the past, to force people and businesses to sell their gold and silver for their fiat currencies.  Really the only other way to transact large business easily and keep the governments hands out of it will be the crypto.  

So I see a future with having quite a few of the big cryptocurrencies on the top but there will also be plenty of room for the "mom and pop" crypto like the local hippy community coin.  We are at the very start of what I see happening with the cryptocurrencies.  I see them like the first credit card -- very slow to start at first but now 40 years later they are everywhere.  With the collapse of the US dollar, the cryptocurrencies will boom and the average person will probably have several they use to transact everyday business with.  This is not even addressing the wonderful market that third world countries offer.  There was a wonderful story by 60 minutes about the future of money that I highly recommend people watching.  My belief is in my lifetime I will get to see billions of people using them for everyday transactions and I don't believe bitcoin will forever stay on top.  It may take 40+ years, but what a ride!!!!!!