I honestly see no problem with people upvoting themselves even if they cash out. They already provided value to the platform by investing to it so a little boost from themselves won't be bad after all. I feel like a content creator should really value his/her work in order to succeed in whatever he /she is doing.My upvote isn't worth anything at this moment but as I said I see no problem in it .

Thank you for contributing to the Steemit Community.Keep up the great work and I'm looking forward to your next posts.