Same but people love their televisions. Most people I know still veg out in front of them every night. They just have all their internet services (Hulu, Prime, Netflix, etc.) plugged into their TV instead of PC.
There is no major use case for bitcoin or the blockchain that warrants the current market cap. A decentralized database isn't going to come close to the economic impact and usefulness of centralized databases (I'm a database developer).
Bitcoin
uses a decentralized database to store the state of the blockchain, but it isn't exactly competing with centralized databases. It's competing with other forms of money, like gold for instance.
I should modify my use case. Bitcoin is "Digital Gold for Gamblers and True Believers". And to all of you true believers, my plan is to sell out at the top (well as close as possible) and for you to lose 99% of your invested money.
Fair enough but keep in mind, the greater fool's theory applies to all assets, not just Bitcoin. Who says dollars or gold will retain their value either?