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Financial experts most certainly do not say anything like 4% inflation in the US.

Energy is extremely volatile, so it’s annual rate spikes up and down by as much as +/- 25% in any given 12 month period, but over longer time spans it’s close to flat, with US consumer prices driven down by fracking.

Food prices, similarly, are volatile, but have trended flat over long timespans.

Food and energy are going to be a tiny, tiny fraction of consumption for someone living off float from an $8 million windfall; core inflation (removing the volatile food and energy categories) is the right number to pay attention to.