What if I told you I don't plan ever selling more than 10-15%? Don't reach to conclusions before you know all the facts. It's a general advice for life.
You had a chance to do it when the price reached last ATH close to $70k last year, obviously, you didn't do it because you believed in what most considered a safe bet ($100k by the end of 2021). You have stated the facts yourself, you want to sell your BTC and enjoy the fruits of your labor as soon as possible, and the reason why you have not sold yet is the price.
From the title of this thread, it can be concluded that your exit point is at $75k or more, which is very frustrating considering that the last ATH was very close to that.