>>60586063even if you were to triple the payload while halving the cost it would not be cost efficient to mine asteroids rather than mine gold /silver on Earth in 25 years time
and again, it's all about if it's economically viable
if it isn't economically viable, there is no reason to mine asteroids
if it is economically viable, then the price of gold / silver are very high
there is also the time factor / time value of money, where if you have to invest $100 billion in order to produce X amount of gold in the future, all of that time of space flight has a cost
even if you had a space elevator (which is impossible) built right now, you couldn't mine asteroids in a commercially viable way in 25 years worth of time
it is estimated that gold on Earth will be not be economically viable to mine by 2050 (but who knows, maybe we have mastered mining sea water for gold efficiently enough where that becomes the main source by then)
as long as it is more profitable to mine gold on Earth than it is in space, it will continue to be mined on Earth
I don't see space mining being economically viable until minimum the year 2075, much after the gold mines on Earth have run out of easily mineable supply, where the price of gold is high enough to make it viable to space mine
if you can't turn a profit in the activity, you don't do the activity in the first place; if you can turn a profit doing it, then the price would be very high / exceed the price cost of machinery, labor, etc where in real value terms is profitable
it makes zero sense to mine asteroids where your cost of production is $10,000 an oz (in reality it would be much, much higher than this) when you can mine on Earth for $1,600 an oz