You've got the right idea. But we aren't going to make it to your end game before going through Usd currency collapse, hyperinflation or some similar disaster.
I am inclined to plan on taking a withdrawal at calculated points during the run up. In this way, I will have saved some of the gain in case the power is lost (think Puerto Rico) or internet access goes out, banks close or whatever (think Venezuela).
RE: When You Are A Cryptocurrency Multimillionaire How Will You Spend It?