It happens to everyone, even to the most consistent, that is why it’s called streak after all! <3
You could look what would be a balanced treat (moneywise) - something that you crave to der yourself but usually won’t because the effort is too big/it’s expensive/you have to drive too far, wait too long etc.. you could stack major goal rewards for your streak milestones,
and if you want to keep it fresh- you should never have the same goal for the same milestone after you may have lost it.
And to keep challenging yourself, you can do it like a game show/ you either go home and claim your reward or keep on hustling but may lose it all..
you may ditch that last rule /idea if you notice it doesn’t work for you or don’t apply it to begin with, but ideally this should keep you pushing for higher dreams :)