in future im sure bitcoin will be stable at ~$500 (after mining ended)
more country will be use bitcoin, and bitcoin will be number 1 online payment
If the price of Bitcoin is just $500 per coin after practically all have been mined, then it means Bitcoin never caught on to mass adoption and is ultimately only used for speculation. $500 per coin puts Bitcoin's value at just 10.5 billion, and with consistent inflation I imagine that number is actually of lesser value than today's market value.