For me,it is much better to invest in bitcoin and othet tangible assets rather than keep or save it on the bank. Bank has small interest compared if you invest in bitcoin and other coins it is more profitable. If you invest in any tangible assets like real state or gold it is good to invest also for a long period of time,it will secure your future.
Many consider good idea investing in not just bitcoin but in physical gold as well. Many economy expert think that these two value will be good for investing in period of 3-5 years, with possibilities that you investment can be more then doubled in this time. They both represent good investment and they have both potential to be good in long term.
long term invest in bitcoin is a good idea but saving money in banks or in your personal wallet is the best because there is still risk in bitcoin or any other forms of investment that you dont have a full control to your funds . Unlike to saving that you can actually see and monitor your funds in your own hands therfor you are only responsible for it but you cannot earn a profit if you dont take the risk to invest. Overall both of them have stil pros and cons.