I don't speak for all communists and there are a bunch of ways to answer that question but personally, I don't believe in seizing assets unless thats how you refer to taxes.
I simply believe there is enough new wealth being created to make sure it gets distributed fairly amongst workers. The economy grows each year but most of that growth is enjoyed by the 1% while wages stay stagnant. If we simply saw that new wealth distributed evenly amongst workers, we wouldn't need to seize anything.

Combine that with the fact that the US government creates new money all the time and most of that money goes to corporations and finds its way into the pockets of the uber rich. I'd simply suggest that wealth goes to everyone. There are a lot of democratic methods for achieving this like Universal basic income, education, healthcare, jobs, or housing. None of those involve seizing assets from anyone.

Evaluating the impact of QE1, which began in 2008, is nearly impossible. At the time the Fed began rapidly expanding its balance sheet, a number of other events and policy changes were taking place. They included the banking bailout, the auto bailout, advent of zero interest rates, the stimulus package and an accounting change that allowed banks to hold assets on their books to maturity at cost rather than marking them to market. Had all of these taken place in the absence of QE1, how would the economy have performed? Would it have recovered as it did? At the time, it was anybodys guess.
https://www.cmegroup.com/education/featured-reports/did-quantitative-easing-help-spur-growth.htmlAs you see, we print money to help the "economy" all the time. I say we start printing money to help everyday people.