buying bitcoin and holding it is the safest possible bitcoin related investment. the only risk is the price that may go down. but if you hold it for the long term then it is a solid investment.
Buying and holding BTC is as safe as it gets if you are not interested in day trading. I would suggest that you buy 1BTC soon and hold it till the halving next year. Small investment compared to the large return you are sure to make on that 1 BTC.