The price is still too unstable to be an decent form of currency, it's more like a commodity right now.
There's also a bit of a learning curve with using bitcoin. Especially now being so valuable, it's a greater target for internet thieves, one has to become much more digital security minded. And if it does become threatening to central banks, they could take actions to undermine confidence in Bitcoin either by having legislation passed to make things more difficult, or pay hackers under the table to cause problems. I'm just speculating about that, but think about it, the central banks enjoy a lot of power and influence in this world, something de-centralized like Bitcoin getting widely popular would threaten that, especially if people started using Bitcoin in a pure sense, directly exchanging for products and services, with no centralized fiat currencies involved. They would not take that lying down.
I also don't like the fact that the blockchain takes up so much space on the hard drive (approx 14GB)
It's going to be interesting to see where this all goes. I don't think Bitcoin is a passing fad. Even if actual "Bitcoin" doesn't survive, idea and technology behind it is here to stay.
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Your Aspie score: 172 of 200
Your neurotypical (non-autistic) score: 35 of 200
You are very likely an Aspie
Diagnosed in 2005