It depends what you mean by "actually study it": bitcoin's purpose is pretty easy and straight forwarding to understand, and you don't need to be a financial expert or have some sort of financial degree to realize that countries keep printing money out of nothing, so inflation will be worse and worse every year. If you get those two points you are ready to buy bitcoin. Then you can go deeper on all the other related topics, especially the more technical ones, but in my opinion you don't need to know everything about bitcoin in order to buy it.
Well there are just those really enthusiastic individuals that tend to dive deeper. People that love to engineer software would probably dig in deeper in technical aspects of Bitcoin which is not yet in my level since it is way too advanced for me. 
What I don't like are those gatekeepers that tell people that they should learn everything in Bitcoin, just to be able to call themselves "tRuE invEstoR". I could even make a meme around that if I have to.