This week, he will find out if he is right.
Salvator Mundi, Da Vinci's long-lost painting of Christ, goes on auction in NY on Wednesday night - giving collectors a once-in-a-lifetime chance to buy one of the Renaissance genius' works, all others of which are already owned by museums.
Bouvier bought the Da Vinci at Sotheby's for $80 million in 2013.
"For auction specialists, this is pretty much the Holy Grail", Loic Gouzer, co-chairman of Christie's Americas postwar and contemporary art department, has said. He resold it within days to the tycoon for US$127.5 million, netting a US$47.5 million profit.
The painting re-entered the art market in 2005, when some art experts acquired it for relative peanuts at a local auction in the United States. As Droga5 puts it in a statement, "As the people looked on, Leonardo da Vinci looked back, painting a picture of the overwhelming emotion that this painting, its beauty and its divine subject matter stirred in all who came to see it".
A top lot at Christie's on Monday was Vincent van Gogh's, "Laboureur dans un champ", a sunlit scene with a ploughman, that fetched $81.3 million, just shy of the artist's record.
For this short film created for Christie's, Droga5 worked with photographer Nadav Kander to place a hidden camera beneath the "Salvator Mundi"-aka "The Last da Vinci"-while it was on display in the auction house's NY gallery space". Chief among them is Francis Bacon's Three Studies Of George Dyer, valued at US$35 million to US$45 million, and which it noted is appearing in public for the first time in 50 years.
Two other such triptychs are in museums, while an additional two have been offered at auction in recent years.
Each of the other 10 Mao paintings (of Chinese statesman Mao Zedong) of the same size are in prestigious public and private collections, including the Andy Warhol Museum in Pittsburgh.
And for the first time, the house has added a rare automobile to an art auction, offering Michael Schumacher's Grand Prix-Winning Ferrari for upwards of $4 million on Thursday.
"No, it's not", said Gregoire Billault, senior Sotheby's vice president, of the sleek, low-slung, fire-engine red vehicle.