Buying aggressively is good when you have the money to do so, because it will help you increase your bitcoin portfolio in a fast pace but let it be within your discretionary income, if you invest buy aggressively with money that's beyond your discretionary income, you are gambling and will sell your bitcoin at loss, especially when the price of bitcoin is below your entry point.
I would suggest that with bitcoin there can be problems selling at a loss as you suggest, but there are also problems selling at a time that is not of your own choosing, even if you might be in profits.
Any of us who might have had come to bitcoin for an investment timeline of 4-10 years or longer, we might spend several years building up our bitcoin holdings, so we might ultimately be in profits on all of our bitcoin and maybe we have even accumulated a year of our expenses into bitcoin, so we are feeling pretty good about our bitcoin holdings, but if we manage our cashflow badly, we might get ourself into a situation where we have might need 3-4 months of expenses, and maybe our bitcoin is the only thing that we have left, and we end up having to dip into our bitcoin, even though we are in profits and maybe they are in considerable profits, yet if we end up having to sell 3-4 months of our expenses from our bitcoin then maybe that reduces our bitcoin stash to 1/2 or 2/3rds of its previous amount, and maybe once we spend those bitcoin (they are in profits - but we did not choose to do it), yet we might have to spend 6 months or more just building back the emergency funds that we should have had in the first place and we have to spend another 6 months or more trying to build up our bitcoin holdings, and maybe even we end up having to spend more than a year trying to build our bitcoin holdings back up to where they were, and we cannot get them back up to where they were even after several years of trying to build them back.
So my point, is that it is not ONLY selling at a loss that could cause irreversible damages, and sometimes guys fuck themselves over quite greatly by selling too much BTC too soon, and they are even selling within "dollar profits." but they may well never be able to accumulate back the quantity of BTC that they had prior to their having had sold too much BTC too soon.
This is true and I agree with you that there’s even more problem selling bitcoin at a time when it’s not of the investors choosing even though the investor might be in some sort of profits as at when the sell is made in the sense that after selling for such fast gain probably due to the increase in market price, surely you will be in some profit but think about when you want to buy back or accumulate next time, it means that you will have to also buy at a higher price too, except you have the mindset of waiting until its dip so you can accumulate, which is a very wrong investment strategy which you might end up waiting for the dip and it might not occur, you’ll slow down your investment and also likely to end up not even continuing your investment, such is a trading mindset and not an investor mindset. Bitcoin investment is a long term investment and not a get rich quick kind of investment where you want to make sharp profits, and at such if you want to attain success in your bitcoin investment, it requires patience in accumulating consistently and hold for the long term without panicking to sell for quick profit. Surely, while accumulating you also build up your emergency funds alongside as it will be enough to settle your other financial obligations when the need arises so you don’t have to tend to your investments (bitcoin)too early for emergency situations.