...
Actually, there seems to be a decent point, that mining costs are not just for the present block being mined.. but for the future and for the speculation.
That's right, because now that we've mined those coins, Bitcoin is secure & we'll never have to mine again. Far out!


Thanks for going all hogwild to twist my post into some kind of absurdity....

I am questioning whether I should attempt to clarify your attempt at a baloney distraction...
O.k... here goes:
Part of my point, is that it makes little sense to calculate all of the mining costs from today, and to suggest that today we, as users, are bearing those costs, just because in the aggregate there are a variety of miners who are assuming those costs on the speculation that their investment is going to pay off.
Furthermore, in the past 5 years, there has been a bit more than 1 billion of large public venture capital invested into various bitcoin start-ups and infrastructure. They are betting that their investment will be profitable. Sometimes it will be and sometimes not, but merely because "they" have invested does not signify that all consumers are bearing the cost of such investment and/or speculation.
I agree somewhat with your point that the future will have to require future incentives, to the extent that you may have made such a point, and those incentives are going to evolve over time... and we will see if some miners get out and if bitcoin becomes less and less secure with the passage of time. Some of that evolution can be attempted at being planned and prepared for, but with lot's of things into the future, it is not easy to predict specifics concerning how the details of development will evolve and how various incentives will continue to evolve because
such variations of future scenarios are a product of a variety of factors that are currently unknown in spite of the speculative bets that can be made concerning such future possible scenarios.