There are several factors to consider when determining an ETF investing strategy, including your investment goals, risk tolerance, and time horizon. Some strategies include:

  1. Asset allocation: This strategy involves diversifying your portfolio across different asset classes, such as stocks, bonds, and real estate.

  2. Factor investing: This strategy involves selecting ETFs that track specific market factors, such as value, momentum, or quality.

  3. Smart beta: This strategy involves selecting ETFs that track a specific index but use a different weighting method, such as equal weighting or fundamental weighting.

  4. Thematic investing: This strategy involves selecting ETFs that track companies or sectors that align with a specific theme or trend, such as clean energy or technology.

It's important to remember that diversification is key to managing risk and that past performance is not a guarantee of future results. It's recommended to consult a financial advisor before making any investment decisions.