If all bitcoin mined, i think the price will very different than now and its must be very expensive. I dont think XRP or ETH will replace bitcoin place in near future because bitcoin still favorite investment.
yeah, that's right.
i think the bitcoin position will not be shifted by any altcoin including XRP or ETH. bitcoin will remain in its place now or in the future.
indeed XRP or ETH is a good altcoin, but both of them still need a long time to pursue the bitcoin position.