I have been reading about house edge, and honestly didn't understand it well.

I am wondering, if I keep winning will my chance of winning further decrease ?
Let's say, I am playing with 70% chance, and increasing my bet amount after a loss, and keeping enough money to cover till loss streak of 20. (which is insane!), and I continue to win, does it mean at some point my loosing streak will exceed 20, and bust all my bankroll ?

How fast your favorite crypto casino are ?

I have seen 2-3 rolls per second (2rolls/sec) in Dice in most casinos. 
I have used in turbo/fast mode. Do you know any casino, which is even faster ?