1. CoinDesk.com: CoinDesk—Bitcoin. CoinDesk. https://www.coindesk.com/price/bitcoin (2020)
2. Morgan Stanley Investment Management: EDGE: Blockchain. Morgan Stanley. https://www.morganstanley.com/im/publication/insights/investment-insights/ii_theedgeblockchain_us.pdf (2018)
3. La Monica, P.R.: Bitcoin is back—but can the comeback last? CNN, 15 Nov 2019. https://edition.cnn.com/2019/11/15/investing/bitcoin-prices/index.html
4. Abraham, J., Sutiksno, D.U., Kurniasih, N., Warokka, A.: Acceptance and penetration of bitcoin: the role of psychological distance and national culture. SAGE Open 9(3), 215824401986581 (2019). https://doi.org/10.1177/2158244019865813
5. Parino, F., Beiro, M.G., Gauvin, L.: Analysis of the bitcoin blockchain: socio-economic factors behind the adoption [Physics] (2018). http://arxiv.org/abs/1804.07657