4 See news.bitcoin.com/miami-bitcoin-conference-stops-accepting-bitcoin-due-to-fees-and-congestion/ 5 Also bearing in mind that settlement finality in Bitcoin is probabilistic and therefore not certain. 6 digiconomist.net/bitcoin-energy-consumption 7 For example, the rollback of Ether in 2016 following the DAO platform being hacked. 8 Keynes, J.M. (1936), The General Theory of Employment, Interest and Money, London: Macmillan.
9 See, for example, Kiyotaki, N & R. Wright (1993), “A search-theoretic approach to monetary  economics", American Economic Review, 83(1): 63–77. 10 Friedman, M. (1960), A Program for Monetary Stability, New York: Fordham University Press. 11 See Gandal, N & Hamrick J & Moore, T & T Oberman (2018), “Price manipulation in the Bitcoin ecosystem”,  Journal of Monetary Economics, forthcoming.