I can tell you right now that I would hesitate to use a 3rd party to handle all transactions. Why pay the fees and give up anonymity for a little convenience. Sort of defeats the purpose of cypto's to begin with. Although I can see 3rd party being used for petty transactions like coffee or fast food where even 1 minute is too long to wait.
Retailers usually don't have a choice.
They support whatever payment methods they have to attract customers. If the choice is between paying a 2% transaction fee or loosing 10% of your customers then they pay the 2% fee. On the other hand, they could start to offer discounts for crypto currency payments handled by one of the crypto-payment processors like Bitpay, Coinbase or Scharmbeck.
In that case, we could see a gradual migration to crypto-currency transactions and away from the traditional payment processors, at which point Visa and Mastercard etc will simply start making corporate acquisitions of crypto-currency payment processors and support those type of payments in addition to their existing services.
Those are some good points.
I was at the farmers market recently and that would be a place where vendors could definitely benefit from crypto's. They already do a lot of cash business but still need to accept credit/debit
One person I know there said she was paying like $150 + 3% to have a debit/credit card machine. Sounds like highway robbery. She doesn't make a ton of money. Fees that high really cut into her bottom line. She could accept payment in WDC on her phone for free.
If companies like Visa and Mastercard get into this game they are going to have to be much more competitive and user friendly. Both the Merchants and the customers are tired of getting robbed and some of us are tired of having everything we do tracked and traced.
I am actually considering living without a bank account or credit card. We are getting close to where you can work around having them if you are debt free.