This is also "not a risk free investment". Alt coin investment has the highest risk of all. Unpredictable if they will rise or fall(just like most of the new alt coins.)
It won't apply in my case since I get those altcoins for free . Like I said it's totally free. So just grab it and save it. Much better to not dump them for now because majority of them is just 7-20 satoshis each.