It really all depends on how you deal with the situation. It is doable, believe me. I have to admit that you probably will have to use some of that Bitcoin to start a small business or to focus make on helping Bitcoin and generating sats in the meanwhile. 

 Okay, fair enough. My definition of "retirement" is to not have to work anymore. If you start a business that's possibly very sustainable, but not aligned with the definition of "retirement"