There is a world of difference between obtaining a criminal indictment, which requires only "probable cause," and a criminal conviction, which requires a finding that the defendant is "guilty beyond a reasonable doubt.". The latter is, for good reason, the highest burden of proof that exists in our legal system.
We know this: For a former U.S. president to be convicted of a crime, the prosecutor's case must be substantial, the evidence overwhelming and the jury unbiased. The most likely scenario is that the Trump Organization will be criminally charged with a financial crime (yes, organizations themselves can be charged and criminally fined if convicted). And if the New York prosecutors have enough documentary and testimonial evidence that Donald Trump knew about those financial crimes, they would be likely to bring charges against the former president, as well.