If you are not able to explain a 51% attack with your own words or give any other reliable response, stfu you poser. But you can explain that the price was not 20,000 but 4,000 bucks in 09/2017. Now you open your mouth. Yes, you clown, that´s not complicated to explain. Your status as a full member only means that you posted a lot of garbage and bs up to now and nothing else.
Ok you show me bitcoin was 20,000 around 21st Sept when this coin was launched.
And i can see from which world you belong where you do not have facts but just random false reality where you live.