How safe is it?
Im not sure if you want to invest your money with bitcoin but bitcoin is really trust worthy you wont regret it once you choosen bitcoin as your personal currency if you are going to invest money then you should learn more about tradings it can help you out to growing money or bitcoins here.
We can't guarantee safety to invest in long term with bitcoin. Because if you are going to hold for a long time. There are sometime that the price as you hold it or invest with it, the price is going to increase and decrease so that is where the safety I'm talking about because you don't have assurance that you are going to be able to get profit with it.
Nothing is assured as long as an investment is concern. YOu can lose or gain money on any investment, long term or short term. If you are confident that bitcoin can be profitable long term, then go for it. If you believe otherwise, then don't. Invest on other things.
If you are not so active in the community you have to select the long term investment, with a lot of money available for long term investment will give you a good chance to make a decent profit and you will no longer monitor the price regularly as long as you believe that bitcoin will be a success.