The most common form of investing in Bitcoin is buying the currency in hopes it will appreciate in value (also knowns as hodling). If this is the case then you need to decide for yourself if you think this is a good time to buy. Meaning, do you think the price will continue to rise.
Dont take anyones advice about what will happen with the currency, do your homework, learn about Bitcoin and come to a conclusion. Personally I believe we are just starting, but thats my own opinion and you shouldnt consider that as investment advice as well.