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<em>Thanks to the development of bitcoin in 2009, a lot of cryptocurrencies and tokens have been established. Currently, there are around 1500 tokens in the blockchain world, and the number continues to increase. Every established token is followed by the process of Initial Coin Offering (ICO). It is a process through which the startups are raising funds for different cryptocurrencies, and are trying to attract as much participants as they can.</em>