What guarantees that bitcoin price will hit $1 million in the future? Have you ever thought, if BTC never reaches 1 million or it takes 50 or 100 years to reach this number, what will you do? Nothing is certain.
Not to mention, even if bitcoin price hits $1 million and you only have a negligible amount of bitcoin, how will you retire?
Bitcoin is a potential asset and it is not a bad idea to include it in our retirement plans, but it would be a bad idea to rely entirely on a new and volatile asset like BTC and dream, it will help us retire. Instead, prepare for retirement by working hard, earning a lot of money, accumulating and diversifying assets...and only retiring when we have achieved our set goals.
You will not be able to just retire and do nothing while you are young because it is very boring. You will still want to do something, look for some investments, maybe start a business or something like that. But it will definitely give you a chance to quit a regular job you do not like. So if investing in bitcoin can help you achieve that, then why not.
I quit my regular job a long time ago and started doing business, but I have no desire to stop everything and retire. I always want to be involved in something, to do more, to earn even more, so even if bitcoin reaches a million, I will still keep doing what I do.