Everything can be classed as a bubble. Property market for example, 30 years ago houses were worth 1/10th of what they are today. gold, diamonds, antiques, collectibles what do they actually offer? Bitcoin is an asset but it brings so much more to the table. For bitcoin not to be successful is like saying technology will not be successful. Everything humans love, they digitize - pictures, games, music, videos, interacting, data, currency. Yes it probably is the biggest bubble in history, this is not a bad thing because if it "pops" it will just generate a new bubble and so on and so.