Then why are you asking for an amount you have to invest when you don't want to take risk on investing,you can invest what you can afford to lose but the near fact that you don't honestly trust bitcoins potential then i think you are not willing to do so.Investing is  a very big risk though,but we are here in this forum inorder to be aqware of the blockchain technology has to offer to all bitcoiners and even other people could say that it is more profitable in investing.Its natural that bitcoins price to rise and fall and we are all aware with that in the first place.