Underground coal mine :-
Most coal seams are too deep underground for opencast mining and require underground mining, a method that currently accounts for about 60 percent of world coal production. In deep mining, the room and pillar or bord and pillar method progresses along the seam, while pillars and timber are left standing to support the mine roof. Once room and pillar mines have been developed to a stopping point (limited by geology, ventilation, or economics), a supplementary version of room and pillar mining, termed second mining or retreat mining, is commonly started. Miners remove the coal in the pillars, thereby recovering as much coal from the coal seam as possible. A work area involved in pillar extraction is called a pillar section.
Modern pillar sections use remote-controlled equipment, including large hydraulic mobile roof-supports, which can prevent cave-ins until the miners and their equipment have left a work area. The mobile roof supports are similar to a large dining-room table, but with hydraulic jacks for legs. After the large pillars of coal have been mined away, the mobile roof support's legs shorten and it is withdrawn to a safe area. The mine roof typically collapses once the mobile roof supports leave an area.
The problem is not that Facebook and Google are the only advertising platforms. The problem is that they are considered mainstream media and without these two, the trend of cryptocurrencies gaining legitimacy is delayed. That is right, I said delayed not blocked or prevented.
The World Has Changed.
Five years ago, when bitcoin was unknown to most people, this might have been a fatal move. Today is a different story. I recently traveled to a remote mountain town in the interior of Mexico. Everyone I met had heard about Bitcoin and eyes lit up with excitement when I ask if I could pay for lunch with bitcoin.
Today are dozens of websites dedicated to cryptocurrencies, either holding them, exchanging them or just writing about them. Probably the most effective advertising remains on Google, it is called Google Search and it is free.
If someone wants to learn about owning bitcoin or any other currency, there is a ton of educational information.
The Flipside Is Being Ignored.
Not All Regulation Is Inherently Bad.
If we examine the full spectrum of regulation to this point on a global scale there is one common target most everywhere. That is the practice of exchanges. So far there has been little or not regulation, threatened or enacted, to protect investors from loss of funds due to security breaches.
Capitulation Is A Good Sign.