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Cryptocurrency: zk-SNARK Privacy Coins, Why and How They Work

	quote:"For an average transaction size of 2000 bytes in a Private " 

	that is to say, private transactions are 10 times bigger than average bitcoin transactions. So what would happen if zcash was actually USED as much as bitcoin is used? How big would zcash ledger become? But I guess that big ledgers are not a problem since you can put a few servers in 2 or 3 NSA-GCHQ datacenters! Ok put the servers in FOUR datacenters to make sure that nothing bad can happen. 

	As a side note monero has the same problem and so do confidential transaction in bitcoin. There seems to be no free lunch and privacy requires bigger transaction which in turn hurts decentralization.