Yes, this is one of the main advantages of Bitcoin. But there are many other important points. For instance what Bitcoin is not subject to inflation. It is also very important
Yes, If you have savings why not put a portion in bitcoin. It doesn't do you any good in your bank account.
the keyword that everyone should pay attention to is "a portion of" and that should be the most important thing when it comes to investing. and that portion should be something that you can afford to lose and also at the same time should be an amount that you can buy a decent amount and make a decent profit when price goes up.