Altcoins are fairly recent and new, what are your biggest worries about them?
Mine is that they may not be as successful as Bitcoin, and end up tanking after my investment.
I think that is the top of the worries of all including the developers.
Unsuccessful ICO's. This will lead to nothing. Bounty hunters might get a little and investors will be forced to withdraw even if there is loss.
That is why I do think that we should be really careful in picking one. Some of the airdrop coins are better than this ICO's.
Why? They just did it for money and will not update anymore after they got it.