So I just told my younger brother about Bitcoin yesterday and today we got to discussing in-depth about it. It's the first time he's heard of them. As you would expect he was curious and asked very thoughtful questions.

One question he asked that really intrigued me is how an entity (one with very very large amount of fiat) that wanted to destroy Bitcoin could pull it off...

He asked: Couldn't they just buy up every single Bitcoin in existence at the highest asking price?

I don't know how to answer this, but it sounds to me that may be the single biggest soft-spot for Bitcoin to me.

Chances are this has already been asked but I don't know how to find the thread so I'll just post this.

What do you guys think?