Auribus Teneo Lupum
It might seem odd to say that you’re "holding a wolf by the ears," but auribus teneo lupum—a line taken from Phormio (c.161BC), a work by the Roman playwright Terence—was once a popular proverb in Ancient Rome.
Like "holding a tiger by the tail," it is used to describe an unsustainable situation, and in particular one in which both doing nothing and doing something to resolve it are equally risky.