Considering the situation, a sealed or public indictment gives Mueller or a future special counsel the widest array of options. It allows for the route that Starr took, pursuing a criminal case first and then turning the information gathered from the investigation to Congress for use in impeachment proceedings. It also allows a future prosecutor to ensure that justice can eventually be served: Even if the trial were delayed until the president was no longer in office—avoiding the constitutional question about trying a sitting president—Trump would still be held accountable for any potential crimes. https://www.politico.com/magazine/story/2018/04/21/robert-mueller-russia-probe-protection-218065
then a report to Congress and impeachment, could be the road.
It was Plato who said, “He, O men, is the wisest, who like Socrates, knows that his wisdom is in truth worth nothing”