Solid business models and profitability will win out over the long run.Investors have fallen in love with artificial intelligence (AI) start-up CoreWeave. The AI cloud provider is growing its capacity at a rapid pace, and it just announced a new $6 billion data center project. Shares of the stock have soared since its initial public offering (IPO) earlier this year, and it now has a market cap of $70 billion.However, CoreWeave is a dangerously unprofitable company, loaded with debt, and tied to the rollerco ...