Volatility has many more factors than a price discovery mode, Bitcoin is becoming an adolescent, in its 10th year.
Ethereum is more advanced in that regard, it needs more retailers to accept ETH to make though.
Advantages Etherum are well known to some extend, to shut the blockchain down will be difficult to say the least.
Governments can shut down blockchains, they just need to work together, that has never happened before though (lmao)
Localbitcoins is a good idea, just be careful it is not 100% save rather 50%.