Once upon a time in a small village on the outskirts of Ukraine lived a boy named Ivan. Ivan was known for his ingenuity and diligence, but his life was far from comfortable - he did not have his own home and money for food. One day, he accidentally came across an article about cryptocurrency in an old newspaper. Ivan was interested in the idea of digital currencies and decided to learn more. He spent hours at the local library reading everything he could find about Bitcoin and blockchain. Iv...