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- The computational power behind blockchain is the equivalent of what one could do in a centralized way with a $100 computer.
If you want a centralized server you can have one for $100. The price for decentralization is much higher. So?
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That's right, the price is higher, but it's fully worth it. Imagine all your life savings put in a bank which works for many years without problems, but one day you wake up and read in the news that today you can buy 5 times less for your money than yesterday, and tomorrow it will be even worse. You go to the bank hoping to withdraw your money and buy gold or something with it, and see a huge line of angry people in front of the closed door.
Also, the "$100" argument here is a weak one. Banks spend more than $100 on security, right?