The numbers should be going way, way down already, as there are a good number of people who aren't exposing themselves to the virus hardly at all (My wife and I are two of them, but it has to be in the millions of people that are limiting their exposure).
Plus the US has vaccinated >17.5 million people, so subtract that from the population and that 250 million estimate, and there would only be 60 million more people who could catch it (assuming no reinfections).
The newest data I can find on this is from the CDC and they've estimated that through December 2020 that 83 million Americans have been infected[1] (and I saw something dated November 27 where they estimated that 53 million[2] had it, so 30 million new infections in December). To get to that 250 million estimate we would have had to have 167 million new infections in less than a month, or more than tripled all the infections we had up until now. That seems very unlikely.
Also their estimate is that 1 in 4.6 of Covid infections are being reported, not 1 in 10 like that Business Insider article (which is dated July 2020, looks like they revised the ratio since).
[1] https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/burd...
[2] https://www.wsj.com/livecoverage/covid-2020-11-27/card/vNksh...