As the title says, Do you think Bitcoin's 2017 highs were artificially inflated? Is it possible to manipulate price of Bitcoin?

Just wondering if there will be a way to revive a dead coins. Those coins that are stuck and not circulating in the network. Those coins in the lost wallet. I believe those dead coins can be considered as deduction to the total supply.  Is there  a way to get them back in the circulation?

Considering a bitcoin owner of large amount, and he died w/o sharing his user/pw, Are those coins can be considered as deadcoin since those coins will not circulate anymore in the Network?

It is said that the largest source of mining efforts is based out of China.  Will it affect the Bitcoin market as a whole when this mining sites taken down?

Bitcoin has been around the borders of financial markets for less than a decade, but is slowly gaining importance as an alternative asset class.
Can the government of any major country step in and do the unlikely?

Is it a better Idea to invest Etherium instead to Bitcoin for Long Term Investment?