If bitcoin rose to $1M, what you do?
I personally would sell maybe 0.00001 BTC (about $10 if I'm not mistaken).
The question is very unrealistic to be happen, but since its only a question, if ever bitcoin is 1M$ then I saved 5 bitcoins perhaps I would sell 0.001 BTC. That's enough for me to en cash it into my country currency.
You are right this speculation is too unrealistic to consider since $1m price is soo high and impossible to reach that price anytime soon. No one really knows what would happen on bitcoins price in near future but in my own view it would not reach that amount. Same as yours only a small portion of my bitcoin would already do to enchash it on my country.