Because always it's possible (with enough hash rate)mine a block with your private Transaction on it, ( yourself or a miner )
yeah, you need just some tons of hashpower, better some Exahashes/sec and a lot of patience
how mutch hash i can get with e5-2699 v4 and 256 gb ram?
It's like asking on the forum what the weather is like outside, when you can open the door, you go out and convince yourself.