The article does suggest the use of bots for trading. Now I am not sure if the writer is a keen investor and trader or not, but bot is something I dislike all the time. Considering the fact that trading itself is majorly risky due to its volatility, it's always better to make with our own research, technical and fundamental aspects shall always be studied before investing.
If you only use the DCA method, you don't need to use bots, so buying and holding is as simple as that. Didn't you say long-term investment and the contrast is based on DCA? This means that it doesn't matter what the price of Bitcoin is when you are accumulating, you only need to place an occasional purchase and then save it.
Of course bots will not be useful for DCA except for day traders who do have fast trading paths. Maybe it still makes sense to use bots.
From the 10 points above, for me to be long-winded, the accumulation plan will be very direct in a certain period of time. no need to check prices every time, no need to use bots, no need to keep checking their Performance Constantly, and so on, just accumulate and store in cold wallets.