The two graphs are dissimilar; two bubbles are clearly visible in the 1982 line before it dipped back to pre-bubble levels. A crash would be sub-bear market levels.
However, Bitcoin actually does resemble the nasdaq composite only repeated many times over, each iteration 10 times bigger than the last. A terrace effect if you will.
The market hit 420 USD/BTC and the bears wondered off in search of food and sleep.
10k USD/BTC (~1/10th of a % of the global currency cap.) in August without the USD crashing is my bullish prediction.
Then, a horrendous "crash" "the end of Bitcoin" they'll say as it dips back to 4.5K USD/BTC.
Edit 10 April 2014:
Looks like I fail at predicting the market
BTC @ $350 and continuing fall. The bears are out in force today.