Bitcoin is a form of digital currency, created and held electronically. No one controls it. Bitcoins aren’t printed, like dollars or euros – they’re produced by people, and increasingly businesses, running computers all around the world, using software that solves mathematical problems.
It’s the first example of a growing category of money known as cryptocurrency.
To start earn bitcoins you must have a Bitcoin Adress. It is your Bitcoin Wallet. You can make one for free here.
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There are plenty ways to earn free bitcoins and I present you the easiest and most trustful.