Describe the Application of Cryptocurrency (especially Bitcoin) .

-What is it?-How will it work?-Is it a feasible concept?-Data that proves its feasibility – tables/graphs/charts-What are its future prospects on a national scale? On an international Scale?-A change in the financial environment (The trend of decentralized system)-The comparison between fiat currencies and cryptocurrencies-Pros and cons of issuing a central bank digital currency