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Transaction rate is all down to speculation.»
Did you read what I wrote? "this indicator is not typically impacted by mere speculators: buying coins and leaving them on an exchange does not create a transaction"
«Payment systems already work fine»
It took me 7 days to move $300k from one bank account to another, because of closures on weekends & ACH limits. This is not "working well". With Bitcoin I can move $100k+ in ~10 minutes.
I have had many instances of credit card payments being declined while travelling internationally due to false positives from anti-fraud systems. This is not "working well".
In 2013 I couldn't even pay my rent using my bank's electronic payment system, even though my landlord and I had the same bank, because of arbitrary policy limit of $2k/mo for personal payments. This is not "working well".
I have had paypal steal ~2% through forex fees for a transfer to my family overseas. This is not "working well".
I have had fraudulent merchants stealing my CC info and created a bunch of hassle that took me time to sort out. This is not "working well".
And so on. Bitcoin may not be perfect, but it solves all these scenarios incredibly well.