Here is the analysis:
According to a new analysis, for every $1,000 dollars the average American keeps in savings, each year they indirectly create emissions equivalent to flying from New York to Seattle.
That is 235.10 kg CO2.
https://www.icao.int/environmental-protection/CarbonOffset/Pages/default.aspx
https://applications.icao.int/icec/Methodology%20ICAO%20Carbon%20Calculator_v11.1-2018.pdf