1. On May 13: Elon Musk announced that Tesla had suspended vehicles purchases using Bitcoin for environmental reasons. As a consequence, the value of Bitcoin and other cryptocurrencies drastically dropped. https://www.bbc.com/news/business-57096305. Accessed 27 May 2021
2. On May 18: China banned financial institutions and payment companies from providing services related to cryptocurrency transactions, and warned investors against speculative crypto trading. https://www.reuters.com/technology/chinese-financial-payment-bodies-barred-cryptocurrency-business-2021-05-18/. Accessed 27 May 2021
3. For instance, in Spain, there are already important condemnatory judgments (i.e. Supreme Court Judgment, 2109/2019, June 20th, 2019) and several on-going investigations are currently conducted by the National High Court (Audiencia Nacional) regarding pyramid investment schemes and fraud
4. ECB: Crypto-Assets: Implications for financial stability, monetary policy, and payments and market infrastructures, Occasional Paper Series, Nº223/May 2019, p. 7 (2019). https://www.ecb.europa.eu/pub/pdf/scpops/ecb.op223~3ce14e986c.en.pdf. Accessed 27 May 2021
5. Proposal for a Regulation of the European Parliament and of the Council on Markets in Crypto-assets and amending Directive (EU) 2019/1937 (COM/2020/593 final), MiCa