If you want to buy Bitcoin, then buy now! Don't wait, as the time passes it would be more regretful and harder for you. If we see the speed of Bitcoin prices are rising in recent days, it would become very difficult for you to buy in future. Many industries like Gaming industries, cab indutries etc started using Blockchain Technology. Here is the link to the article which tells that Bitcoin would potentially hit $40000 by the end of 2018-
http://www.unkrypted.com/bitcoin-hit-40000-by-2018-end-michael-novogratz/
Also, if you are interested, you can read some advantages of Blockchain technology-
http://www.unkrypted.com/benefits-of-blockchain-technology/