Bitcoin is called a risky asset because of its volatile nature and that is why, one needs to invest with only the amount that he can afford to lose, so that if bitcoin price goes below his entry point, he can just ignore the price and keep on hodli. That is why it is advisable not to borrow money to invest in bitcoin so that you don't end up selling when it isn't your will, to avoid loss.
We saw Bitcoin price was stable at 30k USD few weeks back and then there is a dip triggered due to some news. Bitcoin in that DIP went down from 30k to 25k and that's the time where your nerves as a HODLER are tested. Its easy to say to HODL but not many can see there investment going down. That DIP is now over and Bitcoin price is moving up towards 30k again. If you have bought Bitcoin when it was down then surely you are getting some profit at the moment. Accumulating more when Bitcoin is down is more beneficial then when its up.
Exactly because when the bitcoin price is low, you have enough funds to invest with it and make a huge profit when the price rises, when the bitcoin price is low it is an opportunity for the investor to add money to their investment so that they will make a profit, Bitcoin is volatile and that makes it good to invest in my opinion, I can't call bitcoin a big risk because whenever I invest with it, even if the price goes down, I won't sell it because the price will rise again It is not like trading in which you will lose all of your funds if you lack knowledge about bitcoin trading.
We are talking about how one can increase his bitcoin investment portfolio through DCA method and how hodli for a long term so that his profit can accumulate over time. Not buying at the dip and selling with just a little increase in price. Selling is not part of it but how one can be very patient enough to gradually build up his bitcoin investment portfolio to a significant amount, even though it takes maybe 10-20 years, so that at that time one can be happy with the amount of bitcoin he has.
When you sell immediately the price increase with very tiny percentage, you are only chasing shadows and you are not a hodler but a gambler because, when bitcoin price surpasses the price that you sold, you might not be able to wait for the dip again because nobody knows when bitcoin price will dip. Bitcoin sold can't be bought back easily especially when you sell at a lower price, this is the reason why DCA is the best method that is flexible to use to accumulate and increase your bitcoin portfolio over time. Only long term hodlers with regular DCA will not panic if bitcoin price dumps or pumps.