Seniors

I don't have much, I won't get attacked.
However, the business of cybercriminals doesn't care how much or how little you have.
Their automatic tools grind away 24/7 on every account they can find. When they crack one, they determine what best purpose to put it to. Be it stealing directly from you, locking you out and parking their money in it, using it to scam your friends, etc, etc.

The most important accounts are
Social Security
Medicare, or other health organisations
Insurance companies
Your Bank(s)
IRAs, 401Ks, savings accounts

In reality it's all of them. But those are the ones to do NOW.