Both altcoin and bitcoin investment involves risk taking, some professionals said that the more the risk, the more the reward.
Altcoin investment will always be risky at anytime irrespective of the bitcoin price movement, if the price is moving in positive direction, altcoin investment if proper research is done is profitable, but if the price movement go the other way round, then it is very risky to invest.
Generally, altcoin investment is more riskier than bitcoin investment.