Questions on: visa

As I explained in another answer, we can not meaningfully use measures of dormancy from P2P currencies in Quantity Theory of Money comparisons relative to GDP (or in Visa's case total Q over the period). I also explained in that linked answer why it
I wonder how the whole Bitcoin blockchain system will scale in the future. Given the fact that the size of the blockchain will grow exponentially (roughly a tenfold every ~3 years, looking at the recent years) but HDDs only tenfold every ~5 years, th
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