Joining Square and MicroStrategy, Tesla became the latest company to use its corporate balance sheet to invest $1.5 billion in Bitcoin.While some are focusing on the $50,000 level, it would appear to me that it is a given - and $100,000 is possible, too, in my opinion. I'll explain why.Instead of worrying about the risk of buying and owning BTC, skeptical investors should instead ask: "what is the risk of NOT buying BTC?"As my articles on portfolio management suggest, allocating a small percentage (1-5%) toward "speculative growth" can juice total portfolio performance. BTC is perfect for that category.