How do you know this happened to no one else at the Capitol?
Because nobody else or their attorneys have discussed seizure. Also, the feds can seize bank accounts, but don’t cancel credit cards. And, to seize money, they would have had to prove that the funds were obtained or used in commission of a crime to get a Federal judge to sign a warrant.
In short, he either was wrapped up in something else, or is making this up
Or, he is potentially the victim of fraud