How would the entrance of ASICs make the price tank?
The initial increase in bitcoins prior to the mining difficulty adjustment will most likely cause a pullback due to supply demand metrics. Using supply demand metrics this will likely cause a short term pull back in price.
-ak
you are failing to understand how markets work. Sure all things being equal an increase in supply will lead to a decrease in price but markets price these things in gradually over time. the switch to asics for example was probably priced in over a year ago.