Actually you have just spoken my mind on this selling all his Bitcoin at once, no matter how much money you have accumulated in Bitcoin or outside Bitcoin, and think of selling all Bitcoin is the best way, my brother it is not best way, on my own i see all my investment in Bitcoin as an asset, because Bitcoin is my lifetime investment and selling it in a hurry or anytime soon will never come my mind, i will always hodl the dips in long term, so it is very good to always plan ahead of you future, because once you sell up your Bitcoin temptation of the things you will use the money will come immediately as if it was planned and that will make you to start all over again from the cretch and which it will take along time to accumulate, but selling some parts of the investment when you think is due to sell, you can sell some at of it than selling all, and that is why they thread on buy the dip and hodl was created for it to be refreshing our minds on how we should go about our Bitcoin for those that is still coming up.
The bottom line is that we are investing in Bitcoin and it must have a plan. If you do not have an investment plan, you will never reach your destination, so before investing, you must have a plan, according to the plan, it will be possible to sustain your investment for a long time. Not only the plan, you should keep an emergency fund along with your investment, which emergency fund will protect your investment and sometimes help you buy dips in the DCA method.
You must be experienced and careful about investing, because if you participate in investing carelessly, you will not be able to sustain your investment for a long time. So make yourself more experienced and sustain your investment for a long time, you can invest according to this plan.