All the altcoins are about to go down.I portfolio is useful only if there isn't a direct correlation between the price patterns of most coins.The main purpose of a portfolio is to diversify the risk and lower the average price volatility of the assets that you are trading.
I don't see this happening right now,if you hold 100 altcoins in a portfolio and they are all falling by 20-30%.
I've heard about this shimpy.io blog before.Some people were promoting it on the forum,but I don't click on such links,because my PC got infected by a trojan,while visiting a crypto blog once.
I agree with @Davis, right now getting a portfolio is probably still risky in itself given the market volatility and all. However, the article sure looks interesting and its probably useful to read about these different strategies as after all everything will improve at some point - so its good to keep an open mind.