These stocks are on fire right now.Being a long-term investor isn't always easy, particularly when the market deals as a volatile a hand as it has over these last few years. While some stocks have felt this volatility more or less than others, many investors have likely breathed a sigh of relief as the S&P 500 has delivered multiple new highs in the early days of 2024.If the fresh bull market has reawakened your interest in investing, or simply made you want to add more cash to stocks, you're not alone. How ...