Don’t invest in something you do not understand. If you don’t understand Bitcoin you should not be investing in it.

My advice is that, while you might not need to be an expert in the technical details, you need a thorough understanding of what you're getting into. You need to understand how it works as an investment, how liquid it is (ie, can you get out when you want to), the level of risk and what can drive the price up and down.

My advice is not to invest "just because a friend told you to", but to do your own research and make the decision that's right for you.

Anyone now is a good moment to do so