Did Zuckerberg, Buffet, Bill Gates, Trump and other billionaires really lose money in this virus crisis?

Even if they did they have plenty. But its th individual losing job and small business owners who has more to loose.

Zuckerberg sold his majority shares (millions) few months back when it was in 200s...
Warren Buffet is holding more cash being conservative; he is clever enough to know that market is crashing sometime. He knows when to buy low for instance he bought Apple last year when it was around 170s. So his gain is more than enough to accommodate few dollars loss...
Trump has already made more than enough, so no need to worry anymore
Bill Gates holds billions worth of MIcrosoft shares (MSFT shares pumped more than 50% in 2019 so doesn't matter if he lose 20 - 25% of that).

Conclusion: It's not them (among rich 1%), but us regular people who will loose all the time in these times. So basically we are scapegoats, when the bail out happens it's us who pays them back...

Senate Intel chairman sold off stock ahead of coronavirus economic downturn.
He should be locked up like Martha.

Losing money on stock is temporary. Stocks will eventually go up over long run. Stocks should only be sold every 5-10 years on average.