To avoid being the candidates that have mixed feelings after selling out their Bitcoin to address an emergency situation, you have to plan for emergency situations even before emergency situations come forward. That is, as you are dollar-cost averaging into your investments in Bitcoin or accumulating Bitcoin through any other strategy, you have to also plan to keep a percentage of your income as well for emergencies just so that your investment is safe and not tampered with should any emergency happen.
The truth is that immediately you failed to set up an emergency funds to seat for emergency situation ahead, then be rest assured that you have automatically plan to settle problem from your investment holdings when they come and there is no two ways about it. However, most of us failed to understand that future problems are inevitable. Therefore making every necessary preparation ahead is way better than waiting for the problem to come before you'll start running up and down. Furthermore, I think it's better we should plan ahead while kick starting our investment journey, else we will be forced to sort out future problems when they suddenly show up.
The people who deserve regrets are those who sold their Bitcoin off for no reason at all but just because they had weak hands.
I doubt if there are still people like that. Or may anyone thinking of doing that never value his efforts and hard work over the years. Or probably under the influence of something because a normal mind will never do that.