Exactly. If your finances improve and you have more cashflow, you can increase the purchases on the way. People tend to have terrible advice for normal people, in the altcoin world it is even worse as they want people to spend time daily in crypto farming, chasing events and drops, keeping up with news and chats and so on.
Bitcoin should be as neutrally minimalistic and as easy to use as possible. Normal people should not need to check things daily for information, it is too time consuming and manipulative to live like that. It should become second nature, that is what makes DCA perfect.
What makes DCA even more perfect is when we can implement it without stopping and always adjust it to our own cash flow each month. This means that our own level of consistency with this method must also not decline if the goal is to increase our Bitcoin by repeatedly buying it whenever we have cash. But beyond that, I don't think anyone who spends time exploring available information by reading more isn't doing anything wrong, as that's how everyone gathers important information while accumulating Bitcoin after they learn more about it.
Other things like altcoins, events, and drops are commonplace and may not be considered important by everyone, but that doesn't mean they're wrong to know. Having more knowledge about many things will certainly be very useful, at least in preventing us from going down the wrong path when we want to invest in a proven future asset like Bitcoin.
You are right that if you start investing by following DCA, you have to do it for a long time. It is possible if you keep some things in mind to invest for a long time. First of all, the person who will invest must have discretionary income or discretionary funds. If a person has a monthly income, then the extra money left after his expenses is of a fixed amount for each month, then it is discretionary income and if the extra money is of an indefinite amount, then it is a discretionary fund. After this, he must form an emergency fund (for 3 to 6 months) and a reserve fund. As a result, if any kind of financial problem arises, it can be solved. If someone has discretionary income, he can start buying Bitcoin with a fixed amount of money monthly or weekly, it depends on the person who is investing. And if he has a discretionary fund, he will buy Bitcoin regularly, but it will depend on how much extra money he has in a month. This is a very important point, the investor should have a mindset of investing for 4 to 10 years. Investing from non-discretionary income or funds and investing for a short time is kind of trading or gambling.The potential for loss is high here, and even if there is profit, it is limited.
And it is good to have an idea about altcoin. But you should never invest in shitcoin. It is a kind of fraud. If you have to invest, then you should invest in Bitcoin for the long term.