One million dollars may or may not happen. There are too many factors to consider, not the least is the number of viable alternatives. However, those who think it's a fantasy for btc to reach $10,000 are being unrealistic. We would only need a $100 Billion market cap to get close to that number. If history is any indication, btc could potentially achieve that in 5 years or less, depending (once again) on a multitude of factors. But it's very possible and one might even say quite probable. Btc went from a penny to $450+ in 6 years. That's an enormous increase
The price could easily double every year, so in 5 years, it is 32 times of present value, or 18,000 dollars.