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.
It is individual choices when to enter or join the investor /trader world for Bitcoin investment. the entry of Bitcoin or crypto currency into the trading market change the out look of trading market, the business and financial community reacted differently, Bitcoin was hammered by a lot issues on Banned,Scammer, and the never ending issue on regulation on digital currency trading, does affect the price value of Bitcoin and any other ALT coin as posted in the market, Bitcoin price value goes up and goes down as reacted to the posted issues, yet, it remain stable, the global acceptance is growing each day, good luck guys.