I see you are going for a spread, that should minimize your risk. Be aware there is a fair bit of instability about to enter the market for BTC this coming August, I would advise you to hold at that time and not buy any BTC then until issues have been settled; buying now is probably okay, as it should also be after mid-November. Read up on Segwit2X and UASF to get an idea of the timelines involved.