May 420 calls would not exactly be a "spec" play. Look up the word "speculation".
May 460 calls are a definite spec play with huge risk but small investment with high leverage possible.
May 420 calls are FAR less risky. And, with current GOOG momentum, are VERY VERY likely to go up in value (about a 100% chance of that) before expiring.....even if GOOG never hits 420 by OE.
At around a nickel ($5.00) per contract, 2000 contracts would cost only $10,000.00. If you have 10K to gamble and are cognizant most likely (99%) that your going to loose everything, it's not that bad.
If you consider options, consider contracts a couple of months out.