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.
Why not invest in 1 BTC today? i am sure the price is going to be above $500 by the end of this year. We will see an immense increase in the value when the halving happens. So i would strongly suggest you buy at least 1 BTC and wait for the halving even if you are not interested in day trading.