DCA is going to be quite problematic for any coin or project that is generaly trending downard in its price... One thing about any asset with strong fundamentals would be that even if it is trending downward for very long periods of time, if the fundamentals are strong enough, then the downward trend should end up reversing, and sure it is not guaranteed to reverse, and sometimes we might not know that something is a shitcoin until it never ends up recovering.
Surely there are some shitcoins that end up having second lives, and so there could end up being some value in DCAing into them and then getting out during one of their recovery periods... but yeah, would we call that investing? Probably we would call it trading and/or gambling... depending on how wild the coin is and if there might be some reasons that the coin/project actually has meaningful/substantial value beyond pumping and dumping.
But JJG the difference is that we do some analysis here and know that sometimes you trade fundamentals or you can trade the sentiment or information you have. Too many people are still stuck with terms like market capitalization or coin price. They have no idea, don't read basic material about bitcoin, fall for the most fancy techn language and check coinmarketcap for low market cap coins in hopes to see those rice to bitcoin levels. That is where it becomes stupid. You know these sentences "but bitcoin very expensive, trashcoin only $0.05, much potential". Some don't even understand the concept as mentioned above. When there is a coin that costs 1/1000th of bitcoin, but there are 1000x the number of bitcoins, they still think that it takes less money to push the price of that trashcoin that to push bitcoin upwards.
And one thing that I experienced when I tried holding one trash coin which I tried to catch up some of its gains months back was that I wasn't having this peace of mind, Because right inside me, I know there's no guaranteed future, even though that the coin looked promising and later performed well but I wasn't still having that peace of mind I have holding my portfolios in Bitcoin, and obviously I can tell from this experience that holding those trash (shitcoins) is just like gambling your funds.
One thing that is undisputable and remains fact and truth is; BITCOIN IS KING.
There is no potential in shitcoins, all those coins are profit oriented by the programmers or developers, of which an investor should not risk his money into, it gambling and such investor is liable to regret and tears in the future. Instead use the money to accumulate more Bitcoin and build a bigger portfolio, which will yield greatly overtime.
Many are still swimming with the mindset of quick money, expecting great pumps while at the end they see a mighty dump and scam them off there hard-earned money.