I like doing the same as well. When i have money that i know i don't need to spend then i just save a part of that and invest the other part in something that i know can earn me something later on and for me that thing is only alt coin trading which i know can be good for me.
It is important to save and invest parts of your income monthly or yearly. You can use the invested funds to generate more money. If you have you own business you would probably want to modify and develop on it so it can reap extra every year.
Again savings can help you in emergencies or in case you are in dire need to get extra cash. It does not necessarily mean a savings account.