Eswar Prasad, senior professor of international trade policy at Cornell University, told CNBC’s “Squawk Box Europe” earlier this month: “Bitcoin itself may not last that much longer.”

Bitcoin’s price has been highly volatile over the last few years and in the last month the price of a bitcoin has fallen from around $58,000 to less than $48,000.

While there used to be just a few cryptocurrencies, today there are hundreds and some of them are more useful and more environmentally-friendly than bitcoin.