I think a big bubble would be bad for getting wide adoption as quickly as possible. Increased variance is an actual cost, and it is exaggerated in a lot of people's minds. Once it exceeds a certain threshold they write it off as gambling. I'm not saying that is correct thinking, but it's a really common psychology.
They may consider
it gambling, but if the real estate bubble and the tech bubble demonstrate anything, it is that the population has a propensity to participate in speculation. I think it'll engage them.