I think, it's a risky. But if you get a token which have a good project, the profit rate will be higher. So despite the risk, you can also get tokens that are not in the top 100. This is definitely up to you.
To be honest, in the past, that may make me feel that it is risky but now you can see that most altcoin is risky, the value is constantly decreasing, invest in top 100 or outside the top 100, that really does not make a big difference, it just depends on luck to make a profit. And to increase our luck, we should prioritize the choice of real and potential altcoin, should not choose shitcoin, that just makes our luck disappears and becomes unlucky