They sit for hours/days mining painite, so sure, why not?Do we really expect people will spend their free RL time sitting in a Large ship with 250 Painite, waiting for hours/days for price to change, unable to reload that goods and use another ship in the meantime?
Alternately, go dump it somewhere else for less. Like I said before, people were totally satisfied wot just 700k for Voipals when this was first introduced, before the first pirate attack finished the combination. People are just getting their knickers in a knot because it's NOT THE ABSOLUTE 100% MAXIMUM PRICE I COULD GET FOR THIS. Welcome to literally every other activity in this game.
Or alternately, go jump around a few different, perhaps quieter locations looking for better prices.
Or alternately, don't look for the hot prices using literally the same tool everyone uses, which will give the same results.
Or alternately, don't spend hours/days filling your entire hold. Dip in, grab a roid or two, then dip back out to sell before the market tanks.
Or alternately, identify when the next price surge is coming and be ready when it goes up. You literally have a whole day's advance notice before the final state (usually pirate attack) kicks in. Sure, there's a counter here that "oh, but you're expecting people to put their life aside at a moment's notice to spend a day mining". Let's be real... the sort of people we're talking about have no problem spending an entire day grinding out core minerals
Or alternately, mine a variety of minerals to hedge your bets against a single, flooded commodity.
Or alternately, base out of a larger population system where there's going to be more opportunity before demand dries up.
This isn't that hard...