I firmly believe that exchange traded funds (ETFs) can be an excellent way to build wealth over the long term.
They allow investors to access opportunities that might otherwise be difficult to reach, while spreading their money across a collection of companies rather than relying on individual shares.
But with so many ETFs available on the ASX, it can be hard to decide which ones to buy.
To narrow things down, here are three funds I think could be worth considering.

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Betashares Asia Technology Tigers ETF (ASX: ASIA)
The first ASX ETF to look at is the Betashares Asia Technology Tigers ETF.
When people think about investing in technology, their attention often turns to Silicon Valley in the United States. But some of the world's most important technology companies are based in Asia.
For example, Taiwan Semiconductor Manufacturing Company (NYSE: TSM), Samsung Electronics, and SK Hynix (NASDAQ: SKHY) play crucial roles in producing the chips and memory that power modern computing.
And with artificial intelligence (AI) driving demand for increasingly sophisticated hardware, these businesses could have significant growth opportunities ahead of them.
The fund also owns major Chinese technology companies, including Tencent and Alibaba (NYSE: BABA), providing exposure to digital services and online commerce.
Of course, technology spending can be cyclical, and Asian markets carry geopolitical risks. Nevertheless, this ETF could be an attractive way to invest in Asia's growing importance to the global technology industry.
VanEck Morningstar Wide Moat ETF (ASX: MOAT)
Another ASX ETF worth considering is the VanEck Morningstar Wide Moat ETF.
This popular fund invests in US businesses that have sustainable competitive advantages, allowing them to defend their profitability against rivals.
These advantages might come from powerful brands, high customer switching costs, or business models that competitors would struggle to replicate.
But even a wonderful company can be a disappointing investment if investors pay too much for its shares. That's why the fund also considers estimates of fair value when selecting its holdings.
Combining business quality with valuation discipline is arguably a sensible approach for investors planning to hold their investments for many years.
Vanguard All-World ex-US Shares Index ETF (ASX: VEU)
A final ETF to consider is the Vanguard FTSE All-World ex-US Shares Index ETF.
US shares have dominated global markets in recent years, but there are plenty of successful companies operating elsewhere.
This fund makes it easy to invest in them. It holds thousands of shares across developed and emerging markets outside the United States, including businesses in Europe, Japan, China, Taiwan, and Australia.
Its holdings range from established financial institutions and consumer businesses to global technology and industrial leaders. This means investors aren't relying entirely on the US market to deliver their international returns.
For investors wanting greater international diversification, this ETF could be an excellent long-term option.