A bit more than 1% but less than 2%, so I won't disagree here.

Hydro is generally more stable, but often produces 'too much' electricity at larger sites. Bitcoin Mining definitely helps here.

Important to note here is that there are almost no periods when you don't produce any electricity at all like with solar or wind.

And Bitcoin mining won't fix that. Ever.

100.000.000 * 0 is still zero.