Bitcoin is a digital system for transferring value that runs on a public, decentralized network. Its unit is also called bitcoin (BTC). It isn't issued by a central bank like the dollar or the euro.
How does Bitcoin work?
Transactions are broadcast to a network of computers. Participants validate them, and miners compete to add new blocks using a mechanism called proof of work. The history is public, although addresses don't directly equal real names.
Limited supply
The protocol caps supply at 21 million units. That does not guarantee the price will rise: price depends on supply, demand, liquidity and expectations.
Why is it so debated?
Some see a scarce digital asset; others value its open network. Critics point to volatility, energy use from mining and illicit uses.
Is it safe to invest?
There is no universal answer. Price can fall sharply, and there are also custody, fraud and platform risks. Be wary of anyone promising guaranteed profits. New to crypto? Start with the beginner's guide.
General educational content. It is not financial, tax or legal advice, nor a recommendation to buy or sell any asset. Crypto assets carry a risk of total loss.