Normally, If we consider crypto currencies that's nature thing is that, it is a digital currency and it is volatile. This is not only for bitcoin all type of altcoins also fluctuating its price. We cannot say it is stable and predict value of bitcoins.

Bitcoin is a technology,it is not a normal fiat and asset such as gold,real estate like that. It only move to their technical path of the crypto. Some time it was increasing and some time it was dumping. If you bother about it you will be confuse. So,Don't panic by thinking about those things.