For example, if the price of Bitcoin is high, many people may not be able to buy the amount of Bitcoin they want to buy because of lack of money.  But there are people who deposit bitcoins using DCA weekly, monthly.  In that case I don't think he cares much about his holdings, whatever the market.
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In my story , i always log to twitter and see what is happing , see coinmarketcap always, see youtube videos related to crypto. so this makes me sometimes panic , fear. 

please update what things you do
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If you listen to all these market analysis through twitter and youtube then you will be more panic and afraid to invest.  Here, different people present the same content in different ways according to their personal opinion, then the market analysis you do yourself will also seem wrong to you.  There is a lot of information available on social media but I'm not telling you to stop it completely, I'm just telling you to look at very little crypto news on social media. You choose a right coin like Bitcoin,  You just need set the time period to hold your holding which can be one year, two years, three years.