So then if you project your income versus expenses out into the future, you would likely realize that there may well be some potential short-falls and/or uncertainties, so in that regard you have to figure out ways to have cushions in your finances such as emergency funds, reserve funds and floats to make sure that you don't run out of money or need to sell any of your investment (into BTC) at a time that is other than your own complete choosing
This is where most people has failed in their bitcoin investment. Due to greed (norms we humans are emotional beings) but still we should learn how to manage those emotions so that it won't overwhelm us . Most people go all in without no proper planning thinking of even having a good emergency funds to cover some future expenses , inorder to have huge ROI. Which would increase the chances of them running to their investment at the end for survival. Is good to in huge amount of money in bitcoin and also back it up with some nice DCA inorder for you to meet your accumulation goal pretty fast, knowing that you financially capable. But if you know you are managing with your funds same time investing, there's no need for you going all in at ones, there's a reason why DCA strategies is there for you, it would help to accumulate large quantity of bitcoin in a long run and also give you the chances to buy at any price movements reducing the risk .
but some people might take many months of their savings and even years before they get up to $500 to $1k worth of BTC built up, and I suppose some exchanges are more risky than others, too...so we are not always going to know how much balance to keep on exchanges prior to withdrawing to private wallet, but it makes little sense to me to have a bunch of $10 to $100 transactions that might have their periods of difficulty to have those kinds of relatively small UTXOs
you're right and it won't be safe holding your asset for long in an cex account, Ruttoshi if kucoin is actually 10% of the amount of coin you want to transfer is taken as fee. I think such exchange would be good for those that are new in bitcoin accumulation with the use of DCA . If a user whose DCA amount is as low as $10 , want to transfer their bitcoin that they purchased from their cex account to their private account the fee would be 10% of $10 right. And 10% of $10 would be 1. Which means they would pay fee of $1 to transfer $10 and they would end up with $9 in their portfolio if am not mistaken. So such fee won't put that much impact in affecting their DCAing which would lead to them not holding their asset in cex account For that long..🤷