So, you are referring to that your suitcase would be safer place?
If you managed to open a safe with 000000#, then it was factory reset after the last person used it. Many hotels do that. If not in hotel, it was probably a new safe that was never used, as they mostly come with that standard code.
And the poster you quoted was right. It´s more crazy to put your money in your suitcase, than to put it in the hotel safe. So, that makes his statement valid. However, it would of course be better to leave the money in a bank account and use a card or plece it in the reception safe, with a receipt of the money depisited.