>Guess what, you can't create value out of thin air. Bitcoin is useless, you can't do anything with it, except buying and waiting that others buy after you so the price rises up: that's pretty much the definition of speculation.

Change out 'Bitcoin' for 'Gold' and you've just described a 'speculative bubble' that has been going for centuries.

Value is arbitrary. Just like gold, Bitcoin might well just keep on rising and rising. Volatile, but valueble.