As of now the price of bitcoin is 6900 dollars and I think it will increase again more soon and in the next few hours for sure the price become 7k dollars . So if you have extra money in your wallet it's better to buy bitcoin now.
Yup price has started to move in positive direction once again and now it has gone to $7200 from $7000 in last one hour so it clearly indicates that price will go much higher in coming days or weeks so if you have any excess money then there is nothing wrong in investing even now as at the end you will be enjoying some good profits on your investments.
As you said the bitcoin price is started to increase so i hope this price increase will continue in the coming days if it does the bitcoin will posiibly reach upto $9000 at the end of 2017.So invest your money soon in bitcoin to get more profits.I expect the bitcoin will hit $ 100K at 2025 so if we can have lot of money at that time if continue to hold our bitcoin long as much as we can.And one more thing investing on bitcoin at any time is not bad because the bitcoin price will go to moon in the future.