https://www.whitehouse.gov/wp-content/uploads/2021/05/budget_fy22.pdf
https://data.consilium.europa.eu/doc/document/ST-6437-2022-INIT/fr/pdf
https://www.brookings.edu/wp-content/uploads/2018/04/es_20180416_digitalcurrencies.pdf
https://www.ecb.europa.eu/stats/accesstofinancesofenterprises/pdf/ecb.safe202005~c4b89a43b9.en.pdf