I suppose BTC price 250 000 $ per 1 BTC is maximum that we could achieve.
I can't imagine BTC price 1 000 000 $ per 1 BTC or 1000 000 000 $

Do not make fun of this precious source because this is a hell huge prediction and we can not think for prediction like this. Predict only according to the current situations and after discussions with some perfect analysis after all you will come to one point which will clear your prediction. According to some experts the Bitcoin will achieve higher than 30k dollar in upcoming few months.