Bitcoin can reach $100,000-500,000. But $1M and up is impossible. Maybe in 50 years.
It's not impossible. There are tons of trillions out there in stuid stocks, asseets and dead bonds. If some of it came to BTC, it would quickly skyrocket into a trillionare marketcap, pushing the price to $100,000. From now on it's only x10 and you got your $1,000,000 per coin, but governments will attack BTC before accepting inevitable defeated.