Because people are looking for alternative ways on how to secure their assets or how to send safely their money outside.
And that bitcoin is a very good candidate in this situation. Surpassing the 40k mark would be easy in the next few days.
In my opinion, this is a good opportunity to invest while bitcoin is still in this position.
But don't forget about possible consequences, it may be worst for all we know. So invest what you can afford to lose.
As always about buying, everyone is good to buy at these levels if they haven't bought yet because it surely is going to be a good time to buy whenever price is lower.