Mr. Trump, of course, has invited the Reagan comparisons, borrowing Reagan’s 1980 slogan “Let’s make America great again.” And like Reagan, his combination of tax cuts for the wealthy and increased spending by government could lead to higher deficits.

Yet for now, Mr. Trump’s emphasis on tax cuts and deregulation is ushering in an ’80s-like euphoria among the rich. Since the election, stocks have reached record highs. Strong art sales this month at Sotheby’s, Christie’s and Phillips brought in a total of more than $1 billion. Christie’s sold a de Kooning for $66.3 million (well over its estimate of $40 million) and a favorite of ’80s collectors, a Monet, for $81.4 million.

High-end real estate, which was in a slump, is also poised for growth now that a real estate developer will be in the White House.

Sales of luxury goods are rising, after a slowdown in China and less conspicuous consumption put a damper on them last year. An executive with Net-a-Porter, the high-end fashion company, cited Mr. Trump’s wife in the 1980s — Ivana — as a “key inspiration” for some of the fall fashion lines, which emphasize “hard-edged, power-shoulder jackets,” bouffant hair and bright lipstick.

Even Mr. Trump’s celebratory election dinner was an ’80s throwback moment. Rather than heading to Maialino, Le Bernardin or any of the current power restaurants, Mr. Trump and his family opted for the “21” Club, a favorite haunt of the celebrities and power brokers in the 1970s and ’80s. As he told the wealthy crowd at the restaurant, “We’ll get your taxes down. Don’t worry about it.”

And Mr. Trump is reluctant to give up his ultimate homage to the ’80s: his apartment. The three-story penthouse in Trump Tower is filled with gold, marble, Greek gods painted on the ceiling and pillows embroidered with the Trump family “coat of arms.” For a man who once said, “Part of the beauty of me is that I am very rich,” it is no wonder he is having second thoughts about leaving his Versailles in the sky for public housing on Pennsylvania Avenue.

Mr. Trump’s flash and dazzle stand in stark contrast to the new culture of wealth. In the ’80s, success meant excess, bigger was better, and wealth was meant for display. Today’s wealth culture, by contrast, is all about staying under the radar — jeans and sneakers instead of suits, whitewall minimalism rather than gold, and a Tesla in the garage, not a Rolls. They prefer the attention of signing the Giving Pledge to buying a megayacht.