So when is an asteroid really valuable: I mean to the tune of 10 Million Trillion Dollars, that's $10,000,000,000,000,000,000? That's many many many times world GDP !!!
It's when it's 220km in diameter and made predominantly of Iron and Nickel and of course you have the gall to mine it. Article follows......
https://za.ign.com/scitech/148347/ne...00-quadrillion
Best
JA