It can offer riches overnight but it is by no means the standard. From my experience, lots of people want to have the same results as those who bought bitcoin 7 years ago for pennies and now are millionaires. They assume it can happen over a week, month, or even a year, all without realizing bitcoin took 7 years to get there. No one wants to wait the 7 years though, they want their money and they want it now, and that's extremely unrealistic. All that being said, it still can happen. Look at dragonchain, if you invested in that during ICO phase you would be 100x by now, and that's pretty damn insane returns. Ripple last year grew by over 350x at it's highest, even as a shitcoin. Either way, it should never be the expectation, people gotta be patient.