But their values have fallen sharply over the past year.
One bitcoin is worth around $31,000, less than half of November’s peak of $67,000.
Analysts say high inflation and high energy prices have made risky investments, including cryptocurrencies, less attractive.
So what does the future hold for ‘the future of money’?
Presenter: Hashem Ahelbarra
Naeem Aslam – Chief market analyst, AvaTrade
Brian Lucey – Professor of International Finance and Commodities, Trinity Business School
Zennon Kapron – Director, Kapronasia