Bitcoin: cos’è e come funziona.


Bitcoin is a digital currency, which aims
to do away with all the problems we have paying for things online.
You may think that the system we have is pretty good, but everything we buy today has to go
through a bank or credit card company, who take a cut of the transaction and who rely
on our trust that they’ll do everything right. After a while, those payments start to build
up and added to that is security: you have to trust your card company to keep your details
safe. Many people have tried to work out how to
have a payment system without that middleman, but then there’s another problem: how do you
prove that you’ve paid for something or even that you have that money at all without someone
vouching for you? It’s so serious it has a name: the double-spending
problem. Then, in 2008 a solution was offered by an
anonymous programmer going by the name of Satoshi Nakamoto.
Nakamoto left a paper on a popular cryptography blog, which proposed a system of currency
that’d solve all of these fiddly problems. His proposal was that, instead of a bank or
credit card company recording every transaction in one central ledger, all of the users would
record all of the transactions at the same time.
As a result, any attempt to fool the community would be noticed and the payment rejected.
No one, user, government or bank, can force a fee on a payment or control its flow.
The result is a cheaper, quicker and easier way to spend money even across national borders.
So this is Bitcoin and it’s already starting to have an impact on people’s lives.
Within months of the proposal, it was being used to buy and sell goods, although not always
from the most scrupulous of traders. But it’s not all shady businesses.
Some shopping sites take it. You can buy pints in London and even pay for
your university tuition. As you might have heard, there are problems.
While some are profiting from getting involved early, others are losing out from this volatile
in young market and people are found in companies to buy up lots of bitcoins.
But as it’s designed to have a limited amount ever in circulation, that might cause problems
down the road. There’s so much uncertainty around Bitcoin.
Some people genuinely think this is the future, others are terrified it could destroy our
economy, but many from both sides agree that, if we could get Bitcoin to work or something
like it, if we can trust a digital currency to work without the middleman, then the way
the world economy functions could be transformed for the better.

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