Bitcoin will never kill income tax. Once you converted your bitcoin to a fiat currency it is already subject to income tax.
Yes, this. And as most people do convert their btc to fiat and eventually cash out anyway.
On top of that governments will make sure they will remain top dog somehow.
There are no statistics on this
To draw any reliable inferences and conclusions in this regard. Obviously, most people do cash out occasionally, but we don't really know how many and how much. I mean most of the people involved in trading cryptocurrencies (let alone just holding them) don't necessarily convert all of their cryptocapital into fiat all the time or for most amount. I for one am more interested in injecting more fiat into the system than taking from it, i.e. my cash flow is in fact negative (in this sense), and I guess I'm not the only one