Bitcoin is the currency of the Internet: a distributed, worldwide, decentralized digital money. Unlike traditional currencies such as dollars, bitcoins are issued and managed without any central authority whatsoever: there is no government, company, or bank in charge of Bitcoin. As such, it is more resistant to wild inflation and corrupt banks.
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1950: In the future I bet we'll have flying cars
2017: Forum moderators profit wildly from unregulated insider trading of a non-physical currency
I thought that would sound lame, but it's actually pretty not lame