once all coins have been mined, the price will go up, ie supply and demand
By then besides us being dead, 1 BTC will be something ridiculous like 100 million current USD dollars, which means the small BTC made from mining will still be profitable, well it will not be really mining, it will just be transaction processing.
How are people so sure that the price per bitcoin will be so great? There's not analysis that say this is likely to happen, right? If so, can someone share it with me? PM me...seriously, I'd love to read it!
Although we know the price might increase a lot after mining reward halving or 0 block reward, but no one can definitely predict the price in the future. As an investor, we only can invest what we can afford to lose!