I'm Neil and I'm Sam. Have you seen my lottery抽彩给奖法 ticket, Sam? I seem to have lost it somewhere. Is this another one of your 'get rich quick schemes', Neil? People invent all kinds of ways to make a lot of money quickly and with little effort. Well, if you really want to get rich quick, maybe you should copy technology tycoon企业界大亨 Elon Musk. Recently he invested one and a half billion dollars in the cryptocurrency Bitcoin. Bitcoin has made some people very rich very quickly, but as we'll be hearing in this programme, it's not without its critics.
Creating bitcoins, a process过程 known as mining采矿业, uses huge巨大的 amounts of electricity, and green campaigners are now questioning Bitcoin's impact影响 on global全球的 energy use. But, before we find out more, it's time for my quiz question. What year was Bitcoin first released? Was it 2009, 2015 or 2019?
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