Current scientific belief suggests that information can never be created nor destroyed, so when you start talking about "until the end of the world," you need to understand that you are setting a markedly high bar.
Every device treats the process of overwriting existing data differently, so asking for the current state of affairs on a diverse set of devices with the level of certainty you seek is a daunting task. For some devices like EEPROMs, its rather reasonable to assume overwritten information is nearly impossible to recover. For others, such as harddrives, there's no particular guarantee as to which sectors an OS will use, so its plausible that data might not actually get overwritten, even with continuous use. That's why companies produce harddrive erasure tools which explicitly affect every sector on a disk.
From this question and your other question with equally vague details, bad formatting, and a tone that I would categorize as a bit hysterical, I would recommend you pause for a moment and develop what the industry calls a "Threat Model." This threat model is designed to capture the capabilities and intent of any adversaries you face. Once you have developed one, it may be easier to develop actionable questions for which the community can help you with. A Threat Model lets you recognize that there is a cost associated with security and lets you balance that cost in a rational manner. It's what lets you realize that while setting off a thermonuclear device over your computer will be highly effective at sanitizing the data, there are better ways to go about things.