What would happen if terrorists take over the world's metal resources?

Question

I was looking at a photocopied page from a book of future predictions and among of the future events predicted by futurologists (scientists who study the future) was terrorists- and I mean Al-Qaeda-type bombers and criminals- seizing and dominating all available gold, diamonds, and metals (i.e., iron, nickel, copper). Right now, I'm asking you questions:
1.) What would happen if terrorists take over the world's gold, diamonds, and metal resources?
2.) How would terrorists seize the above mentioned natural sources?
3.) Would this kind of terrorist takeover affect the world's economy?
4.) Is there, or are there, any ways to prevent terrorists from seizing our metal sources necessary for our industries?

Answer 1

HOw many futurologists agreed with this prediction?

1) The terrorists would be controlling vast areas of ore. If they need to sell the materials to finance their operations, they might need to find a broker to make the transactions legal.

2) If they had lots of money, they might buy the corporations.

4) I think most mining and refining companies have security (guards, fences) and most countries have borders which make some kind of check for suspicious foreigners with serious weapons.