Also the US GDP is "per year" while the crypto market is a constant value over time. It's still a drop in the bucket.Remember that the internet bubble didn't pop until 2.2 trillion in 90's dollars.EDIT: should also be noted that those 2.2 trillion dollars would be almost double the price in 2017 dollars. Also the Dot-com bubble was localized in the west while cryptocurrency is a global phenomenon. Plus the world economy is almost 4x as big in 2017 than it was in 1990.Thus assuming cryptocurrency is a bubble and it will behave the same as the dot-com bubble it will grow to about ~40 trillion before popping. Of course this is assuming it is a bubble and will behave the same way as the dot-com bubble.And remember even if it's a bubble. Google and Amazon were born in the dot-com bubble and are some of the biggest companies in the world right now. What giants of the future are born right now in cryptoland?