You can't blame them though, I mean just imagine if you have been doing DCA for at least 2 years and you have that target to take profits at $100k. So it make sense for others to go and sell at that price level.
And with that, when the 'weak hands' has been shaken and it has been, causing the price to fall at $91k. But it's good though, as we all know that during this kind of market correction there is a great opportunity to enter and maybe those who will have have a target of at least $150k to take their profits. That is really the market cycle and it added liquidity if there are going to be sellers at some level.
The main factor behind every investment is to get profit whether it's real estate, equity trading or bitcoin. There is nothing wrong in selling your bitcoin if you think you are getting adequate profit. People who have bought bitcoin when it's under 30k or as you said the one who are doing DCA for last two years, it's great time for them to short some of there bitcoins and enjoy the profit.
Bitcoin provides great opportunities to enter again in the market as price take wild swings in both directions. Right now price is highly volatile in 90 to 100k window and very soon it might cross 100k. DYOR