Saving money in a savings account is like putting money in a pocket with holes. Banks only give you interests that are lower than the inflation rate. Its how they make money. You are better off investing in ventures (Crypto currency) that give a return higher than the inflation rate.
Not really. Bitcoin does not give you any interest. If you buy into bitcoin then you are generally hoping that it would go up in value over time.
Though, that's not to say that bitcoin is not a good investment. Banks obviously do give you interest, but it in fact, it's probably one of the worst investments you can make at this moment. This is because of the fact that bank interest just don't keep up with what inflation is taking away from your balance.
Bitcoin on the other hand is a store of value, much like gold. The amount in circulation is always controlled, and this can't be changed from a central point. So that's why over the long term, even if demand for bitcoin stays stagnant, bitcoin would be an excellent store of value in contrast to fiat, even accounting for interest.