Trade in alternative coins is very dangerous. Especially if you do not have experience. Therefore, I recommend newcomers to trade only bitcoin and some coins from the TOP-10
How come that trading of alt coin is dangerous? You should rephrase your word by saying it's risky instead of using it's a dangerous thing. And for inexperienced traders, it's hard and risky but one day it will be worth to try. You just need to ask some tips and keep on learning and educating yourself on how to trade properly. It's your decision that you'll follow, just like I said you will just ask some tips but you don't literally follow them.