Actually if people werent saving bitcoins, they wouldnt pay with Bitcoin and Neweggs wouldnt accept them. Saving and spending are both essential, but it is true that people shouldnt put all their money into Bitcoin.
Yes, I agree with that on the thing that people are putting their whole money and savings into bitcoin.
Not knowing that if they will put their all money they will earn but that's not enough.
They must know also that the risk to put their money into btc is also risky.