I would just add to Spins comments that position management is very important with long straddles/strangles (of course this is true for just about any options trade also).
Depending on your situation, you might want to consider:
At what level would you take profits?
At what point in time would you cut losses?
If there were profits, would you just close the position, or roll one side?
If there are losses, do you want to close the current position and buy a new one further out in time?
When are earnings coming (before or after expiration?)?
Are you going to hold past earnings or close b4 earnings no matter what?
Do you have a good enough understanding of IV and how it can be affected by company news, stock price changes, stock market prices moves (VIX), etc.?
Also, just to mention it, apparently options that are ITM at expiraiton will now be exercised for long holders automatically, so if you don't want this, you have to either close the position before expiration or inform your broker you don't want it to be exercised. Not usually an issue as you would usually close a straddle well before expiration, but something to keep in mind. If you want more info about this, search other topics.
Lots of stuff to consider there.
JJacksET4