You sound lost Bravut. Of course withdrawing bitcoin is the same as selling, so if guys are taking too much profits too soon, then they surely could end up screwing up their bitcoin portfolio building and never making any progress in regards to really getting their BTC holdings up to a high enough level to really profit from being in t bitcoin.
I agree with you JJG, selling too much Bitcoin when one haven't gotten a good number or fraction of Bitcoin in there portfolio is not good because sometimes after selling you won't see the need to invest again or sometimes you won't see the opportunity you were hoping that made you sell your Bitcoin, selling is not actually bad per say but as a low coiner or a beginner you don't have or need to sell your Bitcoin but for someone who have hold for years and has a good amount can sell but not up to 10-30% of there investment because our portfolio will not look nice and one funny thing about Bitcoin investment is that selling can be so easy but buying back an holding can be very hard that is why we shouldn't sell a high percentage of our investment.
Buying bitcoin is easy as just selling it , but buying back after selling ( when trying to act smart) is not certain because how sure are you bitcoin is going to dip the price you want before buying because no one have the ability to control bitcoin price rather we can only speculate.
So better not to sell at all , so that you won’t find yourself in such situations and if you have any healthy treating issue you can use your reserves funds if it is not enough,and things getting worse , then you can think of taken from your investment in order to complete the payment because you got priorities your health also .