Blockchain and Cryptocoins will face the same fate HYIP forums / Liberty Reserves went through-regulatory enforcement and social stigmatization.
Unlike HYIP, which are a malicious scam, and LR, which essentially only existed for money laundering and had a single point of failure, bitcoin is at least some kind of innovation.
This position isn't really better than the knee-jerk "bitcoin will replace the Federal Reserve". Both are based on feelings or ideology rather than research, and both fail to acknowledge the great uncertainty that clearly surrounds the future of bitcoin and blockchain technology.
The only place regulatory enforcement could hit Bitcoin is at the fiat exchanges, which are already beholden to KYC/AML.
> social stigmatization
People have already tried that; "Bitcoin is only for illegal drugs and guns!" Didn't work.