Depends on what the polls say. If your preferred candidate has a real shot go ahead and vote for them. But if their support is a rounding error you're probably throwing your vote away.And viable 3rd parties just don't appear out of nowhere. That's foolish.
It's lemmings like you that ensure a viable 3rd party never exists. You can continue to vote the way you are told to, and I'll continue to vote my conscience.
I won't convince you otherwise, nor will you convince me. No further discussion between us needed.
And on a personal note, my congressional district was decided by 6 votes. That's less people than I have in my immediate family. Your vote has power. With any power it has to be valued and used wisely.