~ So in order to calculate something that is forever gone would be very hard if you do not know the number of it, hence they do not care about that at all.
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I think as long as the circulation of bitcoin is still rotating and still having transactions it will make it difficult for us to count all the coins in circulation and how many have never been touched again, but unfortunately it will never be possible because the trading volume of bitcoin will always increase and that is certain there will always be transactions made.