There are plenty of things being called a bubble that aren't, but cryptocurrency is almost certainly one right now. The formal definition of a bubble is somethi

There are plenty of things being called a bubble that aren't, but cryptocurrency is almost certainly one right now. The formal definition of a bubble is something that's priced far above its inherent value. Unless you want to argue that there's currently $500B+ of actual value in cryptocurrencies right now and not just speculation, it's absolutely a bubble. That said, bubbles don't always have to end in a burst. If real and sizable use cases for cryptocurrency arise, the value could eventually catch up with the prices.