We don't get such an opportunity anymore. Now people will be looking for ethereum to reach $1000. If there arises such an opportunity, even before reaching $1000 people will run for it and buy everything available. People who find it hard to buy a complete bitcoin will make it as a chance to buy it. As the market is decentralised, any form of market moves can happen. We need to have a mind to take anything happening with bitcoin in a positive way.