If the nomination goes to one of the more radical Democrats, you might see less money for their campaign, but I doubt it. Even the wealthier Democrats are very desperate. If the nomination goes to Biden, you may see many of the younger Democrats staying home on election day.
I’ve been speculating about another possibility. The scary candidates are setting the tone. The Dems might be scaring media bigmouths with their plans to confiscate all wealth and the privilege it brings them. The media might be less hostile to President Trump, considering the alternative.