Popular themes on Wall Street today include artificial intelligence (AI), the market for weight management medicines, and the potential impact of tariffs on broader equities and the economy. In 10 years, there will probably be a different set of trending topics on The Street, but those changes won't stop the market from delivering competitive returns over the next decade.Those who want to cash in on that can purchase exchange-traded funds (ETFs) that track the performance of some major index, or invest in i ...