Always better to invest. Saving will lead to losing money for sure, investing makes you have a chance to gain something, maybe not 100% chance but better than 100% chance to lose money in time.
Investing is very important, so I think it should be part of the financial planning. With regard to save money, whether you will lose money or not, it will depend on the way you are storing value. If you store value in fiat currency, surely that money will be worth less over time because of inflation. In the case of Bitcoin, you have the possibility of making a good profit over time.