Not all ETFs follow the same playbook. Some focus on niche trends, overlooked sectors, or unique strategies that can deliver surprising returns. In this article, we explore four unconventional ETFs that combine innovation with strong growth potential. For investors willing to look beyond the obvious, these picks may offer an interesting edge in a crowded market.

When you say thematic ETFs, most investors think of technology funds focused on artificial intelligence, the cloud or semiconductors. However, there are sectors that, while they have not been in the spotlight in recent years, have strong structural trends behind them that could significantly change the balance of entire industries within a few years. Water, nuclear power and rare earths are among such areas.

The common denominator among these four ETFs is that none of them is a typical "fad" that attracts a crowd of investors for a few months and then exposes holders to high volatility. Instead, these funds are based on…