there is no fool proof answer to this question. it is all speculation.
the risks are there but in my opinion price going down in long term has a very small chance. but in short term because of some stuff that are going on can go down but i won't last long.
but there is another risk that people usually forget, when you are using bitcoin you are in charge of keeping your private keys (your wallet) safe. and if you fail to do that, you will lose your money. this risk is easily manageable though, since you can learn how to make a safe wallet (read about cold storage) and never worry about this risk.
I agree with Herbert2020. It would be a smart move to invest your money by converting them to Bitcoins as it allows growth in a short amount of time compared to orher investment ventures. However, you should take note of how much you are willing to invest as even though the rates are projected to continually increase, its flactuations can continue to be constant and unpredictable; but this is temporary. You should only risk what you're willing to lose.
With regards to just storing them, you should take high precautionary measures. You may think your wallet is highly secured but with all the advancement in programming right now, it can be taken away from you at an instant. You should be extra vigilant for the time being of your investment.