Not sure why insider trading would be a thing. What information would affect the price? Most aren't based on anything substantive.
Front running and pump & dump are pretty easy currently. That's not a fundamental thing though. More of a fact that the cryptocurrency environments, especially exchanges, tend to be exceptionally opaque. Somewhat ironically.
Employees at major exchanges can trade on insider information about whether a major exchange will support a new coin. Employees at token-funded companies can insider trade on that same information.
There's already some evidence these schemes are happening at major exchanges. Coinbase's launches of Litecoin and Bitcoin Cash come to mind.
