Newbie here and I want to start trading soon. Just want to get tips on when to invest on btc and eth. thanks in advance! 
Because of the big update of bitcoin its better to wait on the completion of the update. There are many advising here and was also what I do that we need only trade bitcoin after august 1. In about ethereum, you should trade now because its ok.To avoid the disadvantage may wait until the end of segwit is the best choice. You will not experience loss of course by doing this action.