Another lame attempt at blaming Biden for something which has been caused by the Covid crisis and is not specific to the U.S.
Too bad you included 2020 under Trump's mandate in the comparison!
Quote from the article:
"According to research from Americans for TaxFairness and the Institute for Policy Studies, between 18 March 2020 and 19 February 2021, the combined wealth of US billionaires increased by $1.3trn, a 44.6% increase in the space of just 48 weeks.
The concentration of wealth is staggering. There are now 661 billionaires in the US, with a total wealth of $4.26trn as of 19 February 2021, up from $2.9trn on 18 March 2020, nearly a year earlier."
https://www.opendemocracy.net/en/oureconomy/covid-19-has-made-the-super-rich-richer-its-time-for-a-billionaire-wealth-tax/
BTW, who gave them tax cuts allowing them to become even richer, and still wants to give them even more tax cuts?
This is not specific to the U.S., the same phenomenon occured in the whole world
"The total wealth of billionaires worldwide rose by $5tn to $13tn in 12 months, the most dramatic surge ever registered on the annual billionaire list compiled by Forbes magazine."
https://www.ft.com/content/747a76dd-f018-4d0d-a9f3-4069bf2f5a93
Not only did the rich increase their wealth during the pandemic, but they also have been able to buy assets for cheap, assets which value naturally increased post-pandemic.