Some of us and indeed in general, profit is always the main goal of what we are aiming for, which means it is true that selling in the low area is a mistake.
Selling bitcoin according to your analysis plan is the best decision, and I think all investors will also definitely take the same action because again profit is always our main goal here. Now therefore it is very important to pay attention before you jump in there you have to prepare money that will not be used by other needs, or in essence you have full responsibility for whatever happens to your money later, with that I am sure you will not feel too pressured by all the price fluctuations that occur there, and with that it will be calmer to do a long-term hold, but yes even so if there is an urgent need as you said then even though they get a low price it is very likely that you will still sell it, there is no other solution than that and it is natural that they do it.
That is definitely the way to go, it allows you to make as much profit as you possibly could from it. I understand that it is not going to be easy or anything like that, but it is definitely possible to make it happen. I personally hope for the best in order to make as much profit as possible but that doesn't mean that it will be possible for a long term to not face any difficulties neither.
When you face a difficulty like that, the best thing to do would be ignoring them and focusing on your strategy, do not change up just because you see some changes, or if you have something ready for them use that, but do not suddenly get scared and sell just because it went down. That's a wrong move without a doubt.