1. Chohan, U.W.: The double spending problem and cryptocurrencies. SSRN Electron. J. (2017). https://doi.org/10.2139/ssrn.3090174, Accessed 10 Jul 2023
2. de Best, R.: Number of crypto coins 2013–2022. Statista (2022). www.statista.com/statistics/863917/number-crypto-coins-tokens/, Accessed 11 Oct 2022
3. Farell, R.: An analysis of the cryptocurrency industry. Thesis, Wharton Research Scholars (2015). www.repository.upenn.edu/handle/20.500.14332/49177, Accessed 10 Oct 2022
4. Ghosh, A., Gupta, S., Dua, A., Kumar, N.: Security of Cryptocurrencies in blockchain technology: state-of-art, challenges and future prospects. J. Netw. Comput. Appl. 163, 102635 (2020). https://doi.org/10.1016/j.jnca.2020.102635, www.sciencedirect.com/science/article/pii/S1084804520301090
5. Beigel, O.: Who accepts bitcoins in 2022? (2022). www.99bitcoins.com/bitcoin/who-accepts/, Accessed 02 Feb 2023