Wealthy Americans fear another tech “bubble” in the stock market and nearly half the nation is worried that a burst will whack the U.S. economy, according to a new poll.

YouGov.com, polling to determine the amount of concern Americans have with the rising tech market and NASDAQ, found that those with incomes of $100,000 or more are worried the most. By two-to-one, they think there is a tech bubble in the market.