It’s the biggest move yet by the Trump administration to bring private assets to defined-contribution accounts.

Millions of Americans saving for retirement through 401(k) accounts could have the option of putting their money in higher-risk private equity and cryptocurrency investments, according to an executive order signed Thursday by President Donald Trump that could give those financial players long-sought access to a pool of funds worth

The executive order is intended to give investors more options, but experts say employers will tread carefully before adding alternative assets.