I think you don't have to wait for the price of bitcoin to go lower. Because eventually the only way for bitcoin is up. It might dump sometime but it recovers again.
Yes, now is still right time considering that the market price today is still very cheap which is a good strategy because once the price increases .
The current market has the signs to be green or shifting nearly into the green market soon because the market value is constantly increasing. The current value is still below than 10k dollar and we can achieve it easily in order to get large quantity Bitcoins you need to invest in low market. Invest now because this low market will benefit you even in the beginning and this would be your wise decision if you put your savings here.