There's more than enough evidence to start the impeachment process, for obstruction of Justice. Do I think obstruction is worth removing a president? No.
Oversight committees routinely run investigations, so I don't see anything wrong with what they are doing. They were created for checks and balances. Obama was investigated by Republicans for loans that were defaulted, potential bias at the IRS, Benghazi, selling of guns, his birth certificate, and the rollout of the affordable Care act website. These same oversight committees are looking at Trump's finances through a lense of national security, which I do agree with. If you owe money to people, you're easier to influence...so it makes sense to dig into it.
Different types of investigations, but they do have a legitimate purpose. Much like it was a big deal to make sure Obama was a U.S. citizen, Trump's finances are a real threat. Plus, there's plenty of public information available that Trump is using the office to gain wealth through his businesses which is a problem for anyone in office excpet for the president apparently.
Anonymous is an Idea - not a group.