I was happy ot see the exponential growth the last two weeks at the 3 day chart. but now we have lost almost all the growth. What happened?

Well a lot of those who bought under 450 just dump their btc to buy again thats what happen lol they'd keep doing that most probably until the real effect of halving takes place.
If it happen, then they might just wait to its peak before dumping again. the name of the game is dumping lol