Get an unexpected return on investment, for example is a bitcoin investment, if we dare to invest $ 10,000 to buy bitcoin 5 years ago when the price is around $ 100, then we get tremendous profits, but if only saving $ 10,000 maximum profit only $ 1,000
To be more specific, saving is nothing but to keep the funds ideal in less volatile and risky form. If someone is holding fiat currency then it's his investment as the value of his holding will keep fluctuating according to the forex behaviour.
However, if someone is buying Bitcoins with his fiat holdings then it would be another investment. Similarly, if someone is buying altcoin with his Bitcoin holdings then again it should appear as an investment. There is nothing called savings, you just invest in less volatile and risky form of investment.