I know bitcoin when it price 300$. But i don't buy Bitcoin cause i can't believe it. Today btc price highly increase but why? Can you tell what reason?
Well, you have answered the question, bitcoin was around $300 when you knew the technology and you were afraid to buy and it price continuing increasing, the reason it price continue is becasue of it demands. Bitcoin demands gradually started from it lowest to what we have it right now, so, it pump came from it demands.