Bitcoin is a great investment for now. It is at a very cheap price. Moreover, Bitcoin is fairly stable and it is on a rising trend.
Overall, I think Bitcoin is a superb investment, both as long-term and short-term investment.
I don't think that bitcoin can be treated as an stable as price instability is a major concern why new investors do not prefer to invest their money into it as they have a fear of loosing their money and instead of holding for long term I would prefer to make short term profits by taking benefits from short term fluctuations.