He has no idea about technology. He didn't invest in Google and Amazon and he bought Apple at the absolute top. He also bought IBM and sold at a loss. He is equally mistaken with Bitcoin. It's just not his field and his moves mean nothing.
"after I started buying [Oracle], I felt I still didn't understand the business. I actually changed my mind in terms of understanding it, not in terms of evaluating it. Oracle is a great business, but I don't think I understand exactly where the cloud is going."
He’s up about 50% on his Apple investment.
IBM is probably Buffetts biggest mistake of the last decade or so, and he made money on it. He bought shares at $173, sold them for between $150 and $170, but also made close to $30 a share in dividends.
He started buying Apple in 2016 at a little over $100 per share. He’s done well with that investment.
https://bitcointalk.org/index.php?topic=198578.msg2065800#ms...
For example one of Buffett's investment chiefs made that AAPL purchase in the first quarter of 2016, either Ted Weschler or Todd Combs. They bought ten million shares initially.