Yes, Bitcoin was created by Satoshi so that anyone could buy it, regardless of race, religion, or anything else. So, if you say Bitcoin isn't for everyone, I think that assumption is completely wrong. Also, if you mean that poor people shouldn't buy Bitcoin, I think, financially, that's both true and false. Basically, even poor people, if they have a strong desire to invest in Bitcoin, I think they can. As long as there's a desire, I think there's a way. Even rich people don't necessarily want to buy Bitcoin if they're not interested. So, the bottom line is, whether rich or poor, I think we just need a desire to invest in Bitcoin, and sooner or later, we'll be able to invest in Bitcoin. Therefore, I disagree with the assumption that Bitcoin isn't for everyone. Basically, if there's a desire, anyone can buy Bitcoin.
I guess the real issue here is access and mental preparation. Technically Bitcoin is for everyone because it can be broken down to 8 decimal places and anyone can start with rather little money. The DCA method has the advantage of buying in small portions which helps to gradually save a good amount.
But the reality is frankly different. Not everyone is financially stable or has a risk taking mindset. We have seen in history during the bull runs of 2017 and 2021 many new investors rushed in and sold out in panic when the price dropped again. So technically Bitcoin is actually for everyone but in reality only those people who have the at the end of the day patience understanding and ability to take to be honest risks will succeed.
In actually other words whether frankly poor or rich financial situation and mental preparation are essential before investing. Otherwise just having technical access is not enough.