> "How is it going to play out once all coins are mined?" Difficulty, transaction costs, competition with other coins (and off-chain networks/sidechains), and

> "How is it going to play out once all coins are mined?" Difficulty, transaction costs, competition with other coins (and off-chain networks/sidechains), and the market price of bitcoin will all hopefully & probably settle around an equilibrium that is sufficient to incentivize enough miners necessary to maintain the security of the network.