If you want a customized
rm, don't call it
rm but a name of yours,
delete or whatever.
rm='rm -i' alias is an horror because after a while using it, you will expect
rm to prompt you by default before removing files. Of course, one day you'll run it with an account that hasn't that alias set and before you understand what's going on, it is too late.
In any case, a good way to be prepared for file loss or corruption is doing backups.
A fast alternative that will protect you against accidental file deletion or overwriting is using a file system that support unlimited snapshots like ZFS. If frequent snapshots are done automatically, you can recover the files at the state they were during the last snapshot before the incident.