Definitely a ripe spot for put options... but there are no public put/call options available for LNKD yet, as far as I know. It's impossible to price an option without having some history of the underlying security's volatility--and we have zero history for LNKD.

The spread would have to be gigantic to lure market makers into such a trade--and, rightly so, investors aren't interested in gigantic spreads.

If you want to get bearish on this you'll have to strap on your helmet and just short it.