If you are sure your computer is 100% impenetrable to attacks and completely free from all malware 100% of the time, then you should probably present your findings to the CIA or something and be paid handsomely in return, since you'll be the first person ever to create a 100% secure system.
Well, i thought that since I did not download any extra software on my system, never click on unknown links, and had an updated anti-virus on my system, so it is hard to get any malware on my system. Also, i wondered why would any hacker try to intrude on my system, I do not store even a full Bitcoin. Also, another thing that made me confident of my system is that i have faced any such issues for the last few years, using Electrum as a hot wallet.
Anyhow, reading all of the replies and none agreeing with my point of view, i have started to feel scared.
I am testing out making a tail OS through USB and then using electrum through it. This can be a cost effective and better solution rather than making a computer or a mobile an air-gapped device. With tail OS, the Electrum wallet comes by default and there is no need to install any more softwares. Secondly, you can keep save that USB like you save a hardware wallet.
Since i do not have any extra system with me right now to meet this emergency, is the tails USB with the built-in electrum can be trusted?