Currently there are individuals who are involved in jobs, working not because of the money but just to be engaged in something, while they hold on to their investments in Bitcoin, some working their jobs out of love and passion they have for the field they are in. At a million dollars in value, many of them will still not quit their jobs.

Now also consider those who are business owners. As for the job they do, if their investments in bitcoin rise up to $1,000,000, they would not consider shutting down their business but rather expanding their business, maybe through diversification or expansion of the original place. To really get and stay wealthy, you have to think about making more and not eliminating the few sources that you already have working for you.

Just because Elon or other rich people don't have a retirement plan despite having hundreds of billions of dollars. Or just because you don't have a retirement plan doesn't mean others have to think like you and follow your lead. Everyone has different thoughts and ideas about life, no one is the same, and we cannot impose our thoughts on others.
But OP's question is really silly because of the lack of necessary data because not everyone owns the same amount of bitcoin as notocactus said.

Unlike you, I have my financial goals and when I achieve them, I will retire and spend my time doing other things, I will not spend my whole life just making money.

Lol. You bring the inevitable to the table as raw as it should be, mate. It's most certain that not everyone would get to witness bitcoin at $1m or reach there set retirement age with their hodlings before death comes knocking. Which now brings in the question. What plans or measures have we put in place for our next of kin to inherit our bitcoin hodling in the event of sudden death? Some persons have died without their family knowing they have some investments somewhere base on the necessity for privacy and security of their investments asset.

Retirement shortens your life so for me financial freedom is not about stopping "work" altogether, but instead doing something I enjoy and something meaningful.

(4 hour workweek folks will know what i mean)

Bitcoin got to a $100k within a decade of which in between there are years where we did recorded some exponential growth and years where the growth was really slow so i wouldn't want to be in the school of taught that because it took bitcoin that long to get to $100k which i personally even consider a really good growth as a reason to think Bitcoin may not be able to beat the $1m within even a shorter or longer time, there's so much of uncertainties that does comes with this but in all the possibilities around it is actually endless so more can happen within the shortest time we may not expect, it doesn't have to take as long as we may want to propose or expect. But Bitcoin will have to defy it's cycle to get that happening within the shortest period of time.

If you have got a really got or decent holdings on your portfolio, its very possible to retire when Bitcoin eventually reaches such milestone as you can be sure of a huge profit enough to get you to diversifying into other areas of investments enough for you not to really have to work the rest of your life after the said retirement.

Any employee who works at 9 to 5 office will definitely consider retiring from his job once Bitcoin touches 1 million USD. We are sure that Bitcoin price will increase with time but we can't predict the date on which Bitcoin with reach 200k, 500k or 100 million USD. Having said that it's also important that if we are planning for a retirement when Bitcoin will be at 1 million USD then we must start hodling right now. It's obvious that profit will be negligible if we buy Bitcoin near 1 million USD.

My BTC is going to my kids.  Sure, if it hit ten or twenty mil, I might just say fk it and retire, knowing i have enough for that AND for the kids.  But my current plan is to retire on my regular savings and die with the bitcoin.

But again, bitcoin going to the moon could change all that.  I HAVE always wanted to live on a big sailboat.

If bitcoin gets to 1 million USD I think the question of retirement will be base on how many bitcoin or satoshi that the investor has to consider going for retirement, one million dollars per bitcoin is simply 10x of ones portfolio at the moment, imagine someone holding 0.1 bitcoin or below I think even with bitcoin reaching 1 million usd the market value of such investment in usd will be around $100k, in some countries that’s actually ok for someone to retire with but in some countries that’s not enough to leave off your life on.

If bitcoin gets to this amount what I think most people will do is actually look for jobs that doesn’t require their full time even if they need to earn half their earnings now but just to pay off some bills but some people will use that money to set up business for themselves but definitely not gonna fully retire except the age catches up with them

The first one is usually people who born rich, they might be not given a lot of money from their parent, but they already get many thing which will make their life easier. But, this make them feel like too easy in life, hence they choose to work in minimum salary jobs in order to experience and feel the life of other people.

You're correct, business owners doesn't care about FIRE or retirement, all they cares how to make their business bigger and make their business autopilot.