145 australian researchers have estimated that 25 of

[145]
Australian researchers have
estimated that 25% of all bitcoin users and 44% of all bitcoin
transactions are associated with illegal activity as of April 2017.
There were an estimated 24 million bitcoin users primarily using
bitcoin for illegal activity. They held $8 billion worth of bitcoin, and
made 36 million transactions valued at $72 billion.
[246] [247]

In popular culture
Literature
In Charles Stross ' 2013 science fiction novel, Neptune's Brood , the
universal interstellar payment system is known as "bitcoin" and
operates using cryptography.
[248]
Stross later blogged that the
reference was intentional, saying "I wrote Neptune's Brood in 2011.
Bitcoin was obscure back then, and I figured had just enough name
recognition to be a useful term for an interstellar currency: it'd clue
people in that it was a networked digital currency."
[249]
Film
The 2014 documentary The Rise and Rise of Bitcoin portrays the
diversity of motives behind the use of bitcoin by interviewing people
who use it. These include a computer programmer and a drug
dealer.
[250]
The 2016 documentary Banking on Bitcoin is an
introduction to the beginnings of bitcoin and the ideas behind
cryptocurrency today.
[251]
Academia
In September 2015, the establishment of the peer-
reviewed academic journal Ledger ( ISSN 2379-5980 ) was
announced. It covers studies of cryptocurrencies and related
technologies, and is published by the University of Pittsburgh .
[252]
The
journal encourages authors to digitally sign a file hash of submitted
papers, which will then be timestamped into the bitcoin blockchain .
Authors are also asked to include a personal bitcoin address in the
first page of their papers.
[253] [254]
See also

Alternative currency

Base58

Crypto-anarchism

List of bitcoin companies