Extra Cash Problem? Housewife makes $3000 a month working from home!

What do you do you guys do with your extra cash that you have saved up?

I am trying to get into investing(thanks to the tips from a good friend) I'm starting with 5,000 dollars (from the car....) and will be putting it into Tesla, Solarcity, Tmobile, and a few others. Each trade costs about 7 bucks, so you need to be smart and not trade too often. I think this is only when you are trading small sums of money. 

Do you know of any other companies that I could invest in? 

Where do you guys think the future is?  Is there a future? Is it a bubble? Will it pop? What is a bubble? 

Facebook? 

Yahoo? 

Google? 

Elon Musk? 

His cousins? 

Verizon? 

Bike Shops? 

Ebay? 

Amazon? 

Nike? 

Smartwatt? 

Carl Ihcan?  

Military? 

GoPro? 

Anti-Terrorism? 

America bonds? 

Greece? 

Euro? Dollar? 

BitCoin? BitWallet? 

HerbaLife? 

Fracking? Big Oil? 

SnapChat? 

Israel? 

Mutual Funds?