Market cap does not equate to cash on hand. Let's say I give you a banana for $1. You bring that banana to a marathon where someone will pay you $5 for it. That

Market cap does not equate to cash on hand. Let's say I give you a banana for $1. You bring that banana to a marathon where someone will pay you $5 for it. That does not mean I now have $5. Tesla could dilute their stock and sell more, but that is quite the dilution. Further, the sell price might not be just the market cap value, particularly for a profitable company. Though, exactly those kind of take overs do happen (and with tesla's numbers, not too hard to imagine)