As of April 11th many Crypto Currencies dropped to a low not seen in months. Since then many of them have been rebuilding bit by bit.
This is a fluctuating market and is best compared to a volatile stock market.
Since the 11th many of the main Crypto's have gone back up but on the 25th they took another hit but have been still rebuilding.
In the last 24 hours many of them have taken a small increase by 5-10% but if this trend continues to decrease the bubble may of very well popped on a craze that if anything has helped increase great hardware updates where gaming has done nothing to assist the need for new hardware.
In my mind the numbers will keep climbing as Asic takes the market from GPU but if AMD and Nvidia play their cards right and go for lower wattage but higher performance they very well could have a major come back.