Whats it going to achieve?why are people selling it for cash...

Whats it going to achieve?why are people selling it for cash really l would understand if it was replacing cash and everyone was using it but then it wouldnt be going up and down as one day milk would be 50cents a litre and in a year 50bucks a litre
Regardless its bs but make money in it and just play wisely l suppose
My kids every year have a new fad but l always end up tossing them out for the next one
I am not complaining shares are going up in those plays but yea using logic only time will tell
Really comes down to making money right thats why people are buying bitcoins