First, always keep your manuscript saved in multiple locations. This could be on your computer, an external hard drive, and in cloud storage. Second, consider using watermarks or digital signatures to mark it as yours. And finally, don't share it widely until you're ready to publish and have taken the necessary legal steps to protect your rights.
My favorite prose is from The Kite Runner:
We've been running and losing along the way.
We chased the kite but accidentally led it into someone else's hands.
We were angry, we were sad, we felt like we had lost everything.
But when we look back, we find ourselves moving forward.
We are already pursuing our dreams, and the kite is just a passer-by on our way.
We may lose again, but we are no longer afraid of losing.
Because we have learned to cherish and cherish is to never lose.
We run, we lose, but we keep going.
Because we understand that what we pursue is what we cherish.
These words let me feel the true meaning of life. It tells us that even if we lose everything, we should not give up pursuing our dreams because cherishing is the root of never losing.
It depends. If you're submitting it for traditional publishing, often double spacing is preferred. But for some digital platforms or self-publishing, single spacing might be acceptable.