At this time I believe you can buy and invest short on altcoin, you can see that bitcoin prices are showing signs of moving sideways and are rising slightly in recent days and altcoin prices are showing signs of strong recovery. So this is a great time for you to start investing in altcoin. No worries that the bitcoin price will fall.
The market prices today is currently down which sets the price of eth down to $200 dollars and bitcoins at $6k and it was a good news since you can invest a huge amount in order to earn more profit in the market.