> decentralization => crypto Banks already are a decentralized system, just not a very good one. I can send a SEPA transfer from any EU account to any other E

> decentralization => crypto Banks already are a decentralized system, just not a very good one. I can send a SEPA transfer from any EU account to any other EU account no matter which banks they are with and there isn't a "SCT processing company" that handles that for me, the banks communicate with each other - the system is decentralized. But that transaction takes up to a day for pretty much no reason, so we use payment cards for most things. Those are centralized. If Visa/Mastercard doesn't want to handle my transaction, I'm screwed. If instead cards simply signed an SCT message and my bank refused to process it, I could simply switch banks. > credit card companies Yeah, my bad, I should've said payment card companies / card payment processors. For debit card transactions they don't provide any benefit, they are only middlemen between me, the merchant and our respective banks.