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Earlier this week, the U.S. Federal Reserve released probably the best data yet available on the use of cryptocurrency among people in the United States. For the first time, the annual Survey of Household Economics and Decisionmaking included questions on cryptocurrency. Wisely, the designers of the survey distinguished between three different ways to use cryptocurrency. The survey asked: In the past year, have you done the following with cryptocurrency, such as Bitcoin or Ethereum?...

On August 1, 2017, the Bitcoin Cash (BCH) hard fork occurred, raising the permitted bitcoin block size above 1MB and creating a separate history of transactions from that point forward. At the moment of the hard fork, all self-custody owners of BTC were endowed with an equal amount of BCH that they could spend with their private cryptographic keys. Owners of BTC on exchanges were at the mercy of the exchanges' decisions to allow trading or withdraw of BCH....

As government scrutiny of cryptocurrencies has intensified over the last several months, concern has grown over the possibility of a two-tier market for cryptocurrencies that have a transparent ledger. On one side, there are “clean” coins that are held and disbursed by centralized exchanges that require identity documents to comply with government-mandated Know-Your-Customer (KYC) regulations. On the other side, there are “dirty” coins of a unknown provenance that may come from mixers, CoinJoin transactions, and peer-to-peer trading....

It is about time that I give a progress update on my CashFusion Red Team Phase One Flipstarter. As a reminder, the long term goal of CashFusion Red Team is to investigate any weaknesses in the CashFusion CoinJoin protocol and/or CashFusion user behavior and attempt to mitigate them. The main projects of Phase One are to improve the fusionstats.redteam.cash web app and release the rbch R package for statistical analysis of the BCH blockchain....