Younger investors prefer real estate, crypto, and private equity when it comes to opportunities for growth.FatCamera/Getty ImagesWealthy Millennial and Gen Z Americans are skeptical of traditional investments, per BoA.The survey found 72% of young investors don't expect above-average returns from stocks and bonds.In addition, half of young respondents said social media was their primary source of financial content.Millennial and Gen Z investors are skeptical of traditional instruments like stocks and bonds, according to Bank of America's latest study of wealthy Americans.Nearly three-quarters of respondents younger than 44 agreed with the statement, "It is no longer possible to achieve above-average investment returns by investing solely in traditional stocks and bonds."By contrast, only one quarter of Gen X and older respondents held that view, similar to the responses in 2022, Bank of America said.Out of a dozen options, stocks and bonds ranked near the bottom for younger investors in terms of growth opportunities.