A couple of years ago, when the markets were in full tech euphoria, many people wondered what to invest in for 2024. I myself was analyzing that question, and what I saw was quite interesting: a market that seemed to be heavily betting on a very specific group of companies.

I remember noticing how Alphabet was on everyone's radar. The company had shown significant growth driven by its investment in artificial intelligence with Gemini. What caught my attention was its P/E ratio of 29, relatively conservative compared to other tech giants that exceeded 35. Its ecosystem of brands like Google, YouTube, and Android continued to generate more than 80% of its revenue through digital advertising. With free cash flow exceeding $77 billion, the company had the financial muscle to invest in innovation.

Nvidia was another name that constantly appeared in investment conversations. Its dominance in AI chips was virtually undisputed, controlling nearly 90% of the market. The fascinating thing was seeing how the artificial intelligence sector was taking off, and Nvidia was at the center of it all. Its stock performance reflected that privileged position.

Then there was Novo Nordisk, which represented something different. The anti-obesity drug market was growing explosively, and the company was a pioneer in that segment with products like Ozempic. Projections spoke of a market that could reach $44 billion by 2030. That was a significant growth potential.

Berkshire Hathaway seemed like the option for more conservative investors. Warren Buffett had built something solid: $157 billion in cash and a beta of 0.64, meaning less volatility than the overall market. It was the safe bet.

And Broadcom, which had acquired VMware, was diversifying its business beyond semiconductors. The projected growth was aggressive, especially after that strategic purchase.

The interesting thing is that when we think about what to invest in for 2024, the answer depended a lot on each investor's profile. If you wanted quick moves, CFDs offered leverage and flexibility. If you preferred to play long-term, these five companies offered a fairly diversified portfolio: technology, pharmaceuticals, finance, and semiconductors.

Market volatility during those months was considerable, with central bank movements, geopolitical conflicts, and U.S. elections creating opportunities for active traders. But for those with patience, selecting companies with solid fundamentals and holding them was the classic strategy.

What I learned from that analysis is that there is no single answer to what to invest in for 2024. It depended on your time horizon, your risk tolerance, and your ability to stay disciplined when markets moved. Some bet short-term, others built positions with a multi-year view. In the end, both approaches made sense.