I'm not talking about the short-term, not the medium-term, but the long-term.

What are best arguments that Bitcoin won't last?

So far I'm convinced by the pro-arguments decimating the con-arguments. But what if there are some damning arguments out there?

Please try to present them, and please present the prerequisites for why those arguments could be valid.

And just posting "there are no negative arguments against Bitcoin" or "up up up" is not going to further the discussion.

We need good con-arguments and attempts at destroying them, if possible.