How much money are you willing to lose?  

Maybe the safes strategy is to buy a little, then buy more when there is a dip.  I think a lot of people have made some crazy money and they will dump some.  But dips are not happening too often and the recoveries are quick.  

If you are buying for long term it shouldn't matter.  I feel like this coin is headed for top 10 and over $100 this year.   At least!