Age should have nothing to do with investing in Bitcoin. However, it is risky, and you should invest only funds that you don't mind losing.

It depends, it is legal in some, illegal in others. This might help: https://www.investopedia.com/articles/forex/041515/countries-where-bitcoin-legal-illegal.asp

Simple answer: They do not want to lose control.

First time I've heard about this.

It is something that nobody ever takes into consideration. I think it's great that you have brought it up. If all currency is digitized you would think that the government would have to provide access to that money to the poorest. However, considering that there are people in this world that starve to death every day, and their governments are doing very little to nothing to help them (because trust me there are countries where the government just doesn't give a shit), it is hard to think that they would provide them access to crypto-money.

I think that banks will not completely disappear, but they will have to adapt and implement the use of cryptocurrencies in general.

Just use another cryptocurrency

It will never take over Bitcoin.

Hello,

Maybe this will help    : https://www.coindesk.com/information/how-bitcoin-mining-works/

Bitcoin is more volatile

Considering this question as a good joke 

There no chance that it can be bigger than Ethereum, but that doesn't mean it won't be successful 

There are so many conflicting information about this fork. There are articles saying that is cancelled, others saying it is suspended, and now this. Does anyone really know what is going on?