Buying Bitcoin aggressively with the fund set aside for basic is one of the step for every Bitcoiner to sell at lost price no matter the good intention s/he has and no matter how people make wrong decision with their Bitcoin investment we can only make them understand the fact about how to accumulate Bitcoin profitably because even if you're Satoshi and you provide them the right guide they will still end up following their path.
Your response is a bit contradictory to me because how do buying bitcoin aggressively a step for bitcoiners to sell at lost. Anyways while i am still trying to grasp what you are saying, i can tell you that there is no such thing as bitcoiners selling at lost price while investing aggressively but i can put it in a clearer way for you. Buying aggressively can only depend on the size of your discretionary income such that you can chose to invest all without minding how big the amount is since it is still at the level of your discretion. It can also depend on how big your income is and how little your expenditures are that will tell if you will have enough discretionary amount to invest aggressively.
Possibly you might have omitted where he said buying bitcoin with money set aside for basic needs. The key words there is ( Basic needs). I think this is why you were confused with what @Suzanne5223 was trying to say. When reading a posts, it's better we are relaxed. We should not be in haste, or high with substances as this might make us not to read through the lines. Now that I have pointed out where you missed, hope you will go back to his post and see that he was actually on track with what he saying.
You can be aggressive as you like when comes to bitcoin purchases Aslong you have enough discretionary income to back things up , because going with money that you gonna need , like for basic needs is not a smart one at all because it will only give you more reasons to sell early and most time selling early may = to losses , there are some folks that sold their bitcoin when the prices drop to the range of $78k recently because of some certain expenses they wanna take care of and this is where emergency funds are needed because with it you be able to hold your bitcoin as long as you can, even when there might be some expenses you be able to handle them without tampering with your bitcoin investment.