The volume of transactions would make RCs very scarce. They'd be rented out to generate cash to pay for the infrastructure. I'm not sure how competitive Hive would be if it had to have such a massive throughput. Centralized payment processors do not have to pay for 20-100 nodes to operate in consensus. They are much more efficient in handling a great volume of transactions.
What Hive has to offer is something else, namely, independence and censorship resistance. In that game, Hive is more efficient than PoW chains.
There are ways to keep scaling the chain. It is estimated that we could handle probably 100 million transactions, combined. This is not only financial so we are talking about having to scale a great deal more.
Blocktrades mentioned there are other ways to keep this ball moving on the scaling side.
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I'm sure it can be optimized. But centralized payment processors are also under competitive pressure to optimize.
Sure they are. The difference is there are networks on top of networks. The entire financial system is hodge podge mess.
Plus they still have the fees that are gouging people globally.
It is going to be an interesting race.
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And for large sums there's bureaucracy.