Yes, it can be scary and confusing when thinking about how vulnerable our cryptocurrency can be. I have always read that we should have some type of external storage, like our computer. But be careful that you backup the computer. We can also keep it in a wallet on a smart phone, but I would make that a separate phone from the one I use on a daily basis, and only use it for cryptocurrency storage, keeping it in a safe place of course. Also, it is a good idea not to have it all in one place.