Saving cannot be said to be wastage. People actually save for investment because bulk money doesn't come especially for salary earners except entrepreneurs who could get some huge sum of money from a deal. Even they too save.
There are people who save because they just want to save and they're afraid of taking any investment. That's different from people that save because they're going to invest their money in something else that they know will grow their money. I wouldn't say that those that are savers just for the sake of saving money are wasting also their time and money. But, it's like having a fund that they can spend whenever they are and that's liquid cash. While those people that save for investments, it might take time until they manage to get that money back for a specific period of time and it's not as liquid as the saved money unless it's on the crypto market where they can sell it as soon as possible when they're in need of money.