The goal of the predictor is to make predictions that come true.

It isn't clear that this applies to prediction systems like Solomonoff induction or Levin search - which superficially do not appear to be goal-directed.

This will lead to the predictor behaving somewhat like the Oracle in Greek mythology, making whatever prophecy is maximally self-fulfilling, sometimes with disastrous results.

I found an example:

The oracle delivered to Oedipus what is often called a "self-fulfilling prophecy", in that the prophecy itself sets in motion events that conclude with its own fulfilment.

It is also discussed here.