Whats the fastest way to lose your money?

Buying at ask, selling at bid, repeat...

 

What's the screaming I hear? It's someone shorting oil!

 

wanted to add: writing straddles.

 

Whats the fastest way to lose your money?
Ignorance.
Very popular method.

 

Sounds like your holy grail.

 

Oh I see, so you write straddles and lose money.