Saving our hard earned money have never been a bad idea, but their are certain things we need to consider before thinking of saving, such as inflation.
Saving keeps your money from moving to generate profits and conversely the value of the money we save continues to lose value.
Investment has two potentials, generating profits if executed correctly by choosing one of the best investments ever, losses if the investment is carried out not based on correct knowledge because along the way we choose several things that make the investment a loss.
However, both must be implemented because in my opinion savings are also needed to meet certain needs and investment is a way of preparing for a better financial stage in the future.
When you save, your money does not move. You are missing the opportunity of maximizing the time as your instrument in order to increase your cash overtime. This is the reason on why there are investments in which banks would often borrow your money in furtherance of their other projects and you will receive a corresponding interest rate depending on the amount that you invested.
This principle can also be applicable in cryptocurrencies given their large store of value. If you purchase let's say 1 BTC and HODL it, you are not only saving (due to its store of value) but you are also maximizing the opportunity of earning more in the process due to BTC's high volatility.
In conclusion, people should definitely invest money. But again, investing is not as easy as it sounds since you must also take responsibility of your investments in order for them not to lose value during a critical time.