Is there an Assassination Plot in place for President-Elect Joe Biden on January 20, 2021 at the Inauguration?

In good faith I ask and I fear my question might be possibly true-

Is there an Assassination Plan or Plot in Place of President-Elect Joe Biden at the Inauguration on January 20, 2021?

Why do I ask?

President Trump will not attend!!!

Does President Trump know something from his Top Secret Intelligence Reports that he has still kept from President-Elect Joe Biden? Is this why Trump won’t be attending? Does Trump know such a heinous Crime is planned? Is this the real reason why Trump won’t attend?