No it's not. The most likely reason for that is Trump probably gave money to Planned Parenthood or a similar organization that would harm the pitch to his base.
We have his legally required financial disclosure forms that show a range on his income. Some of the best wealth trackers on earth - those at both Forbes and Bloomberg - have also put together sound estimates on his wealth (closer to $3 billion, not $10 billion).
Factually Trump presides over a sizable, serious business that is generating a large amount of cash.
Prominent assets: $765m Vornado partnership, $525m golf course & resorts, $445m 725 Fifth Ave, $480m 40 Wall St, $420 Niketown building, $330m other properties, $295m liquid, $140m 502 Park Ave, $95m DC hotel
"President Donald Trump’s latest financial disclosure report shows he had at least $434 million in revenue last year, but saw a drop in money coming from his Florida luxury resort Mar-a-Lago. The report, released Thursday, is required to be filed annually with the Government Ethics Office. It covers the president’s finances for 2018, his second year in office."