Only because there aren't enough users yet.  Global usage will make PoS coins more decentralized.  According to some theories, bitcoin is probably going to get more centralized as it matures.

Not to mention cutting out corrupt middlemen like banks, while effectively lowering transaction costs.

Before you post nonsense do just a bit of research first. When I named AXR as my daily pick it was trading at 4500, less than 2 hours later it peak at 7910. Then for 30+ hours it hovered above 6000 sat, and then it slowly started declining. Now it is trading at 4606 sat, 106 sat more before I picked it. What did you think would happen when there is no news and the community is not very active? Did you think the price will keep going up forever? During the time AXR was on the front page of Bittrex what did you do to get the word out? Did you Tweet or go into troll boxes and let everyone know why AXR is a good buy, or did you just watch the charts dreaming about all the money you will make as the value kept increasing? I spotlight new coins and it is up to the community to show why everyone should buy the coin I spotlight.

PS: Cryptocurrencies and all financial products go up and down in value. Learn the difference between dumping and a gradual price decline.

Iconic Expert calls AXR on twitter!
after it a little pump started about 1000sat gained.
What do you think?

it's waking up. best get some cheap while you can.