Right now the easiest way to make money from cryptos is buying them cheap and sell high !! But when a new technology comes there are plenty of ways to take advantage of it, there will be jobs directly related with cryptos soon, not mentioning that someone could specialize in cryptos today, for instance a lawyer might start to learn about the laws and rules exist or will be voted, then he could use this knowledge.
In a way you are correct but the field of law is not where I would expect any kind of big development since many of the users of bitcoin don't want to engage in a long battle versus the banks or governments they just want to be left alone and use their crypto currency as they see fit.