Market is very volatile and it really could make you rich or not the way your expecting an investment would turn out.
so crypto market is unpredictable, i suggest you study here for a while. and start reading some thread regarding any interest you would like to invest time and money.

and some scam is considered also risk right.
ill give you quite something for example.
Ill start with Scam ICOs in which ICOs projects will invite possible investors and then just ran and take all the money earn on the ICO. and not continuing the project.
and in some countries are ponzi scheme, in which your going to invest an initial amount and promised a larger profit for a month or so. but in the end its a pure scam.