Yes, we know investing in DCA method is much less loss and less risk. However, if your friend makes such a comment, there are some similarities between trading and gambling. Because if gambling is played a few times then there is a possibility of becoming an addiction, and later on you will be interested in gambling, just like if you start in trading then you will be attracted to trading later, in that case you will lose money there. As we know, investing in Bitcoin is the most profitable compared to trading. If you start trading then start in bitcoin it will not let you face loss, but you will get profit from here especially use DCA it will help to reduce risk all the time. We know it's always better to use DCA as a smart investment.
I think people who compare DCA investing with trading and gambling may not be able to understand this investment properly yet. I would instruct them to read this entire thread thoroughly so that they can gain thorough knowledge about DCA investing (as it has been mentioned here hundreds of times that a newbie can start investing with little knowledge of Bitcoin and little money). But they are right on one point that trading can be compared to gambling as there is maximum risk and profit uncertainty in trading just like in gambling. To avoid risk and reduce stress, we commit to holding bitcoins for a long period of time by buying and accumulating bitcoins over a period of time using a fixed income source.