Power can be abused. I know a person who keeps saying "Bitcoin was created by the Government, we cannot trust it!" I point out we do not know that for certain, but am concerned about the huge amounts in old blocks that have not moved yet.
The Bitcoin network is so impressive and it's the best I have ever seen, it produces 67 times more hashes per second than there are grains of sand on Earth. This is so so amazing and incredible. another amazing fact is that in terms of raw operations per second, it is 500 times more powerful than the world's most powerful supercomputer.