I think the risk will be high if we invest in altcoin outside the top 100. However, high risk is great profit. If we take the risk, we invest wisely in altcoin not in the top 100 then we will have a lot of profit in the future. I would choose to invest in altcoin in the top 100. I do not like the risk, only one mistake, I will lose capital. Some altcoin that I will buy now is Ethereum, Cardano and NEO.