"You probably have to stop buying votes.."

This is not going to happen.

Fun fact at the end, this account never bought an upvote...

Where is the problem then?

4USD is a lot regarding current prices. Maybe you should power these steem up instead of selling them.
At current prices it's not worth to sell steem. Also the SP would help your account and you could power it down when prices are higher again.

The next altseason is already coming. :)