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Authors are also asked to include a personal bitcoin address in the first page of their papers. Cryptocurrencies have been compared to Ponzi schemes, pyramid schemes and economic bubbles, such as housing market bubbles. Almost 74% of ransomware revenue in 2021 — over $400 million worth of cryptocurrency — went to software strains likely affiliated with Russia, where oversight is notoriously limited. But Russians are also leaders in the benign adoption of cryptocurrencies, as the ruble is unreliable, and Putin likes the idea of "overcoming the excessive domination of the limited number of reserve currencies." As the popularity of and demand for online currencies has increased since the inception of bitcoin in 2009, so have concerns that such an unregulated person to person global economy that cryptocurrencies offer may become a threat to society. Concerns abound that altcoins may become tools for anonymous web criminals. Bitcoin Cash Bch In either case, there is no need fo...