It's like cash money, but you can copy for backups if you want. Pretty good imo.
It's like cash in the sense that if you lose it, it's gone forever. But it's different from cash in that, lost cash is often found by someone.
like cash destroyed in a fire with no record of serial numbers.
backup is kinda like a record of serial numbers, if you can somehow prove it was destroyed the central bank might accept your record and recompense you. (might think your lying and trying to double spend too which is not like btc backup)