Amidst all the information available in this regard this is the most important.
Whites are simple older than blacks. Wealth accumulation takes time. The average white family has been at it much longer than the much younger black family. Of course, there are other reasons for this disparity but 'time in service' is certainly the most important one.
The most common age was 11 for Hispanics, 27 for blacks and 29 for Asians as of last July. Multiracial Americans were by far the youngest racial or ethnic group.
www.pewresearch.org
In my never to be considered humble opinion, that probably is a component of the big picture. But I think the wealth gap between blacks and whites at this time is more cultural than anything.
Because the left demands that we all remain race conscious (and therefore racist), black people are more often seen as seeing themselves as black first before anything else. That is amplified in perception because so many black people are given specifically 'black' names and are taught that it is wrong to act, speak, dress 'white', i.e. mainstream. And that makes them less desirable to both black and white employers who perceive them as more trouble maker or not fitting in than responsible workers.
And a little over one third of black children are blessed with growing up with two biological parents in the home which gives them a distinct advantage. By some credible studies such children who prepare themselves to live and work in mainstream society on average do very well financially mostly because they are more likely to stay away from illegal substances and activities, far more likely to graduate high school and college, more likely to get married before having kids etc.
The two thirds in single parent or step parent homes can also do fine, but statistically are far less likely to do so.
A society that exalts, approves, praises the single parent more than it does the traditional nuclear family does a great disservice to the children no matter what the skin color may be.
The number of upper middle class, millionaires, billionaires citizens who happen to be black continues to significantly increase and, while not yet achieving parity with white citizens, most likely because of the age/experience thing, they are closing the gap.
All this is to reinforce my constant mantra that until the woke/liberal/Democrat/bleeding heart/do gooder meddlers understand that skin color should be seen and treated no differently than hair or eye color, will the so-called 'systemic racism' end. It is those 'meddlers', many of whom profit from racism, who created the current racism and are doing their damndest to perpetuate it. And there is some evil in that.