~snip~
I think there is no rule of investing with savings, maybe they both posses the same feather but still differ in purposes. we mostly save for the future most likely in terms for health. If I will invest then surely that's not from my savings as we know that investment always involve risk but every people have different perspective so it all up to on how we dealt with our investment.
Investment is basically saving your money but with interest. There's a risk involved because it also has risk reward.
But the "purpose" isn't the main concern here. You can either invest or literally save for a different future purposes, may it be health, business, and other financial plans that'll involved settlements.
There are actually investments with low-risk involved, though ROI's are a bit lower than those with high risks, but at least you're like actively saving your money as it grows over time.