> If we realize that the decentralized application will always be costlier than its centralized alternative, we must ask ourselves: why do we need decentralization? Then, we will really know what blockchains are for!
Are you really asking why money should be decentralized? Also do you realize that bitcoin takes about 30 minutes for an irreversible transaction, while credit cards take 30 days before you can spend the money that someone gave you.
In the case of a consumer spending money, a method of electronic spending that's not unilaterally reversible is most definitely a bug. For a lot of honest vendors that's also true - they want a situation in which people don't feel constrained from spending because of the high level of risk involved.
Reconciliation between finance houses? Not so much, sure.
Are you really asking why money should be decentralized? Also do you realize that bitcoin takes about 30 minutes for an irreversible transaction, while credit cards take 30 days before you can spend the money that someone gave you.