As market-capitalization-weighted index ETFs, both VOO and VTI naturally feature a high allocation to large-cap stocks. If you want to focus more on mid- and small-cap stocks, a dedicated non-core ETF like VXF might be ideal. This ETF tracks the S&P Completion Index for a 0.06% expense ratio.

If the Magnificent Seven continues to produce outsize returns, the Mega Cap Growth ETF will probably beat the S&P 500 again in 2025. But the more stock prices outpace earnings growth, the more extended valuations become, which can pressure companies to deliver incredible results.

If you're looking for a simple way to generate wealth in the stock market with little effort, you can't go wrong with an exchange-traded fund (ETF). ETFs trade like stocks, meaning you can buy individual shares.