You can cheat 'currency' items as much as you would like. If you add items that will somehow change your game progression percentage like keys, chests, kamasutra pages or somehow unlock what has to be unlocked, then it MAY bug at some point, therefore it's not safe and you shouldn't need to do it. I've been rocking 99 talismans for a while now, never had bug. I have like 1.5 bi money. However, I have experience with game adress manipulation, so I know my ways around. The recently introduced Talisman of the Gods, I didn't dare to edit it, because it sounds like a key item, So I have a legit number of these ones. If somebody laughs at you for cheating money, just laugh at them back.