It’s probably most important to take a long term view of asset allocations, stick to the plan, and be tax efficient. Once you cover that off, the tactical positions can maybe help a touch.

Diversification is the bedrock of portfolio management, meaning owning a range of assets that collectively perform acceptably under a range of scenarios. But it’s generally not sexy, not something you catch individuals bragging about - avoiding permanent loss of capital.

Think about what risk you’re willing to take, in the context of your job/career prospects, current investments etc.

These are things for you to decide. Wouldn’t trust anyone who says buy x without knowing your individual circumstances.

What I can say is there are consistent patterns for many successful investors, and the media will tend to focus on the outliers / lottery winners, which by definition are difficult to emulate / replicate. Be wary of survivorship bias and the narrative fallacy.