After all bitcoins have been mined, there will be no more bitcoin to mine. Miners will no longer be rewarded for successfully mining a block into the blockchain; instead, they will only be rewarded for confirming transactions (transaction fees). The price will most likely be x100 of what it is now😁. About the price is just a mere speculation, we can't really tell what the outcome will be by that time, but I'm sure none of us alive today will witness it happening, and my reply today will be live until that day to see.