President Donald Trump’s bid to lure wealthy immigrants to the U.S. with a “gold card” program could drive up home prices and worsen America’s housing-affordability crisis, according to real-estate experts and people who’ve studied similar immigration incentives in Europe.

Trump’s gold card is designed to replace the EB-5 investor visa, which provides billions in investments to American businesses. But there are some big differences.

U.S. President Donald Trump on Tuesday suggested the possibility of substituting a current visa program for foreign investors with a gold card that could be purchased for $5 million, offering a pathway to American citizenship.