Apple (AAPL) - Get Report to $1 trillion? Who cares.

The real bet is the one Berkshire Hathaway's  (BRK.A) - Get Report (BRK.B) - Get Report  chief Warren Buffett may be making: $2 trillion Apple valuation.

"He clearly views it as a long-term hold, and it will certainly compound over $1 trillion in the not too distant future -- and then double again in the next five years," says former hedge fund manager and Buffett expert Whitney Tilson. "I don't think it's a bad bet, as a Berkshire shareholder I am happy he owns Apple."

The billionaire's holding conglomerate Berkshire Hathaway hiked its stake in Apple by a whopping 23% to 165.3 million shares in the fourth quarter, according to a filing earlier in the year. Buffett has shown a voracious appetite to eat up Apple as the tech giant returns massive amounts of cash to shareholders via dividends and buybacks. It doesn't hurt that Apple's iPhone remains a dominant force in the smartphone market and services revenues is strong.

In the third quarter, Buffett upped his stake in Apple by roughly 3% to about 134 million shares.

Berkshire acquired its first stake in Apple in May 2016. At the time, the conglomerate said that it purchased 9.8 million shares during the first quarter at an average price of about $109 a share.

Apple's shares are now closing in on $200 and a $1 trillion valuation. 

Watch what Tilson thinks about struggling electric car maker Tesla (TSLA) - Get Reporthere.

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