Earlier quoted context omitted.
Tesla has a market cap of 673.80B at the moment. Their BTC holdings are barely a rounding error.
Comparing their asset balance with the market cap of its stock is complete nonsense. Tesla has 100% access to the BTCs and other asset it holds but there is no access to the market cap. Its a fictive price tag on all existing shares. People use it to compare companies. The money does not exist anywhere and certainly can not be used by Tesla.
Ben Graham, one of Warren buffet's mentors, wrote a famous book called the "Intelligent Investor" which has several chapters on doing exactly that.
Think about it...if a company sells $10 billion in stock, the new stock adds $10 billion to their market cap and they get an extra $10 billion in cash which goes on their balance sheet. And likewise, a company can buy back shares and the reduction in marketcap from destroying shares is equal to the amount of cash assets being removed from the balance sheet. There's a link here.