$100k is a logical price for now. But for $1 million? I have nothing to say. It will probably take at least another 15 years and we can talk about 1 btc = $1M
It might go to $20,000 again First (Unlikely), but it will get to $1,000,000 at some Point.
Bitcoin always knows how to surprise everybody but I don't think we will ever see it again below $40k, and I'm already being extremely conservative because for me $50k could be the new lowest price. Regarding reaching one million is a matter of time, especially because of inflation. Probably by the time bitcoin will be worth $1 mln the buying power will be the same as today's $500k.