I think that investing in everything is risky especially bitcoin. Dont take anyones advice about what will happen with the currency. Personally I believe we are just starting, just my own opinion and you shouldnt consider that as investment advice as well.
I think Never invest more than you are able to lose Bitcoin is a very risky investment and you should keep in that in mind at all times. especially the price Bitcoin is still going down this time.

You should consider 2018 as a great year to invest in bitcoin. Last year was a surprise for the investors wherein they were able to benefit a lot from bitcoin as it pumps up very high. You should invest on your own risk but it would be worth it if ever you will earn money from your investments. Bitcoin will not always go down that's why you should not miss the chance on investing.
If the correction phase ends in bitcoin, we can see much better prices in bitcoin and alt coins. This is the most expected scenario. Never pay attention to those cheap fuds hanging around the forum.