Not to say that it is quite dangerous, but there is always a certain risk, also with any coin, you always need to take the risk to earn more resources than expected, without risk. I think. 
Not to say that it is dangerous enough, there is always a risk with any coin, you always need to take the risk to get more. It always depends on the coin you hold. Can you imagine how rich people have held good coins a few years ago? So basically holding a harmless one always depends on the coin.