"I never want to you look like you."
"Don't worry, you never will."
That's why. Filing 424: secondary offerings to the public market.
https://www.sec.gov/Archives/edgar/data/1318605/000119312516...
There's $2,000,000,000 right there raised through the public market.
https://www.sec.gov/Archives/edgar/data/1318605/000119312516...
There's 300-million or so.
https://www.sec.gov/Archives/edgar/data/1318605/000119312514...
There's another $2,000,000,000 raised.
--------
Companies go public to raise money. Elon Musk wanted to spend $5 Billion on a Gigafactory. How else was he going to get the money?
You may also some day want employees, and it seems unlikely you will be able to compete in compensation on the private side.
False statements like "I've secured funding to take Tesla private", for example...
You're never forced to go public, but you will be required to disclose financial data to the public if you have more than 1,999 individual shareholders and assets with a value that is greater than or equal to 10 million dollars.