Sources

Articles:

• http://www.bbc.com/news/technology-35343561
• https://www.theguardian.com/sustainable-business/bitcoin-crypto-currency-sustainable-alternatives
• https://www.smithandcrown.com/open-research/issues-and-risks-associated-with-cryptocurrencies-such-as-bitcoin/
• https://hacked.com/biggest-bitcoin-hacks-thefts-time/
• http://www.investopedia.com/articles/forex/042215/bitcoin-transactions-vs-credit-card-transactions.asp
• https://cryptome.org/jya/digicrash.htm
• http://www.usbe.umu.se/digitalAssets/90/90697_ues838.pdf

Images:

• http://www.techspot.com/images2/news/bigimage/2016/01/2016-01-15-image-5.jpg
• https://www.theatlas.com/charts/r1xUZEpml

Video:

• https://www.youtube.com/watch?v=leAW0gCz9vw