Investing in the technology sector is a bold bet that today's largest companies will continue delivering outsized gains. After a slow start to the year, the tech sector is rocketing higher again -- driven by Nvidia and Microsoft becoming the first companies to surpass $4 trillion in market capitalization. There are many ways to invest in top tech stocks, such as buying them directly or going the route of an exchange-traded fund (ETF). If you scan the holdings of a low-cost growth-focused ETF, chances are it ...