The so-called private “crypto-currencies” can never prevail as general money substitutes. Their designation is a misnomer as they are not a currency but just a commodity used as a speculative asset and as a restricted medium of exchange in very special circumstances, comprising criminal activities or failed States with collapsed institutions.
https://www.rba.gov.au/speeches/2019/sp-dg-2019-08-27.html  8/12  8/28/2019  A Balance of Payments | Speeches | RBA  Graph 7  Graph 7 shows the breakdown in the yields we pay and earn between debt and equity and between liabilities and assets. The graph shows that the main development has been a sharp increase in the payments on foreign equity liabilities.