Depends on how much you are going in with and what you think is a risk. To me spending 100 dollars on 10 new coins means 1000 dollars risked and that's a lot, that would be over one month salary for me. However to some people that is nothing, that is play money, so they get in even bigger. So, as you can see it is something that changes from individual to individual and from amount to amount as well.
If YOU find it risky, that means it is risky to you, if I do not find it risky, that means it is not risky to me. That is the nature of risk, its changeable and that is why we can't really put a mark on any coin for being risky or not since it changes. Of course there are obvious shady or scammy looking ones, in that case that makes it risky to put in even 10 dollars but those are for obvious ones and not unsure ones.
It's true that risk level differs from person to person depending on your financial status, however even if your financial status is high, one still needs proper research before investing in new coins. Generally investing in new coins pose higher risk compared to already existing coins, but when the risk to reward ratio is ok, one can invest but with the mindset of investing what you can afford to lose.