I have a very simple strategy. I invest in ICOs I like and then try to hold long term, min 3-4 months. This was my hair is not turning gray and I have the potential to make decent profit. For major coins like btc or ltc, I'm keeping certain budget unless some other coin shows up where I see enough potential.
I do not even know, and how you have a result, from what I know so to do now is no use at all. It's easier to bathe on etherdelta coins, or just sell x2 when you go to the stock exchange if there is a stir and then reboot.
I'm still buying altcoins because I feel I'm afraid of bitcoin. Getting altcoins from excahnge platforms is easy and selling them with profits is not that hard. I only hope they can make price rallies for us.