Because the number of bitcoins is limited, when all bitcoins are mined, all miners will face unemployment (may continue to mine other cryptocurrencies), because the value of bitcoins will get higher and higher. People will not sell bitcoins after only bitcoins, and wait for the value of bitcoins to gradually rise. Bitcoin's transaction volume will decline. Many whales will not profit by selling bitcoins to buy bitcoins, and the return of bitcoin's volatility is gradually decreasing.