there is no need to explain because you can back track the chart , and if you will look closer? this section has tons of thread talking about why and how bitcoin will reach another ATH just don't be lazy to look for the answer directly to those threads.
and besides are you investing? so you are asking these question ? if yes then best to buy now and never let lose time buying.

Buy bitcoin and try not to be scared of volatility , because that is the only way to find the result in the next couple of years .