The funny thing is that insder trading in stocks are based on inside information of the organization, with bitcoin there is no business centralized to bitcoin.
What inside info would you have on the bitcoin network?
The inside information is regarding news related to Bitcoin in some way.
For example if you knew that GOX was about to suspend withdrawals then you would sell BTC on BTC-e knowing the price is going to go down in the near future.
Hardly inside information, its common scene and making sure you know the signs of something that is soon to fail. I knew almost a year early that Gox was going to go or suffer a big hit from the tell tell signs of a business having problems and falling apart.
Rule 1
If you see a website is suffering from so called attacks or making announcements of problems with site, Delays in payments, Asking for more personal information for validation then this is early signs.
Rule 2
If a site has had delays in payments to bank accounts for more than 2 weeks and has not got up to date with back log of pending payments to its members, then its more than likely they have much bigger problems on their hands that they will not admit to in public.
Rule 3
If a site is offline for longer than normal and has not posted updates but then posts updates saying more delays due to unforeseen circumstances then this is another sign of the site braking down. However sometimes sites need extra time. If they are a big company like GOX then its hard to tell if will continue or not. My advise is to take what you can and remove BTC into your own wallet.
Never ever have all your coins in one place is a golden rule to follow if trading a lot only have a small amount or your funds split across sites so that if theirs problems within that site you can easily recover in another site and trade and earn it back providing theirs enough markets to trade on along with volumes.
I would hardly say its insider information. Its taking caution, doing research and do-diligence across exchanges/markets and making sure you are up to date with news by reading what is currently going on. Once you learn how to read the news about Bitcoin related subjects or even exchanges and you know what to spot then its mainly common scene and can come in very handy at times when markets are all over the place.