system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is my money doing when it is removed from my bank account on Day 1, but doesn't show up in my Paypal until Day 8?
gpt
A few things:

1. to the model of paypal this is "the float" - they can make a little money by maintaining a predictably large pool of cash that they can make interest on.  This isn't much these days, but sometimes it is.

2. they are waiting for a period of time to pass where the transaction can't be reversed.  Paypal doesn't want to give you what is liquid-funds to buy stuff with if it can't be sure it _really_ has a handle on your cash.  The wait gets them outside the reversal window of the transfer.