Don't say Bitcoin and crypto together or Bitcoin and altcoins together. Your post is like knowing Bitcoin is also knowing altcoins or knowing altcoins means understanding Bitcoin.
DCA is a good investment strategy especially with Bitcoin investment and accumulation while it can work bad if you apply it with altcoins or shitcoins.
With Bitcoin, if you DCA and hold bitcoins a long time, you get good profit but with altcoins, if you hold them a long time, you get big loss. If you DCA altcoins a long time, you lose bigger capital.
When people say crypto, it means like generalizing everything but altcoins are any other coins that are not Bitcoin. Altcoins comes from the world alternative coins people can invest that are not Bitcoin. They have done different marketing to make people think that they are the best like the next Bitcoin and there has never been any best Bitcoin since all these years, there can never be any Bitcoin, there is nothing greed related to Bitcoin but altcoins are full of people with personal interest.
DCA only work for Bitcoin but can work for some altcoins if you don't go after shitcoins. There are good altcoins no matter how bad some looks like. Solana as done worst in the past but it has done more than it has run from beginning. There are investors that bought it while it was going down in price and today it's has done well today, even BNB is one of the best performing altcoins that if you have done DCA in the last few years, you will be at good profit today.
There are many good coins, but far more bad ones.It seems to me that usually those who are looking for different altcoins for investment, even if they successfully invest in a couple of positions, lose more on others that did not justify themselves.In order to make a profit from altcoins, you need to constantly, 24/7, monitor the market.This is a lot of stress, and this method is not suitable for everyone to earn money, and if you do not do this, then, most likely, the profit won’t be satisfying.For more stable investments, bitcoin is a better choice, but it’s not the right time to buy it now.