Is the guy who wrote this article talking about XEM? will this XEM:

https://coinmarketcap.com/currencies/nem/

or have another? because honestly I don't see this altcoin as a good investment, in my opinion it's very risky to put money on that altcoin

YFI, LEND and ATOM they are altcoin that have risen a lot in prices in a short time, i would expect to see them fall more to buy if i were to invest in these altcoins