Altcoins are like bitcoin a high risk investment. And yes altcoin will always have a higher risk then bitcoin. Because bitcoin is the lead currency, and all altcoins are traded against bitcoins. So if bitcoin goes down, the altcoins will either. So even when they are risky, they have also much more potential to grow, because they have a lot smaller marketcap.
This is very true. Your favorite Altcoin could be the best project around with a super team and yet until the day comes when you can buy Crypto easily with fiat, it is always going to depend on the BTC price.