Its only a bad investment if it has zero value at the end of those 10 years, or stops producing cash flow then. OTOH, if its producing enough cash flow to have

Its only a bad investment if it has zero value at the end of those 10 years, or stops producing cash flow then. OTOH, if its producing enough cash flow to have a market value of many times more than the 6B initial investment, it might look like a bargain. TSLA market cap is currently greater than 600B and it produced 6B in positive cashflow in 2021 alone.