As someone who despises Trump with a passion I'm gonna need to see more sources/evidence to outright believe this.
There's no doubt that he took money from Putin as bribes but Trump being a KGB insider? I'm a bit skeptical about this.
Again Trump sucks major balls because of the nonsense bullshit he's pulling on Americans but let's stay out of conspiracies. Playing the same conspiracy game doesn't help anyone.
Edit:
If someone asked me if Trump's a KGB insider I'd probably say 50/50 just because I don't have that much information atm to make an informed guess.