In the given list the most important factors that I consider as a threat to bitcoin are the cost of production and regulation.
I wouldn't say media coverage because in this world of internet almost everyone is socially connected and the news are spread instantly across the globe.
Whether it be a positive or negative news the coverage is across the globe.
On the other hand the cost of production and regulation are real threats to bitcoin which causes a correction every time it impacts bitcoin.
All the other factors drives the price of bitcoin upwards.