Do you every consider why the recession of 2008 happened or back in 1929. at those time no bitcoin has any existence. i think that Bitcoin will emerge when all the world is going to face massive recession and it is not to far. currently the currency war is at its peak, majority of nations are now fed up with Dollar controlled economy, so they are searching the ways to shift the dependency to some other source and currently they have some hope in Bitcoin and other crypto currencies.