Yes the market cap is huge especially when compared to a year ago. Some people say Bitcoin is a bubble and over-priced, but in my opinion its just that people are finally catching up and becoming aware of its existence. Even institutions like banks and top tech firms haven't been aware of it until recently. Laura Shin writes for Forbes and has been doing great work for years, and just recently finally got a cover story. Also with all of the hard fork drama news outlets put out stories about bitcoin trying to put out a negative viewpoint about it because negativity is the only way they can get headlines. But this has only put more eyes on Bitcoin. One of the top searches on Google this month is "What is Bitcoin?"
So considering that "What is Bitcoin?" is the top search on Google this month there is no way that this is a bubble. People are catching up and finding out about this amazing tech that will revolutionize the world for sure. The recent influx of cash has been documented and can be seen on the market cap charts as proof.
In other words, more and more people are learning about Bitcoin, seeing what it is, and investing. There are a lot of crazy people out there, but a silent minority is smart enough to see a good thing and latch on to it.
RE: Bitcoin Hits New All-Time High Over $4,400 As It Catches Paypal In Total Market Cap