1. Offer gets rejected by Paypal's board since price is too low
Price falls back down a bit to $48-$50's, a bit higher than before but lower than now.
2. Stripe/Advent may come back with a higher offer (70% chance). They started low on purpose. It's negotiations.
Price may re-open at $60's.
Paypal is unlikely to take the offer right away now. So if you're thinking to buy now, the upside is low (7%), and downside is higher (10-15%). Not a good risk-reward time to bet.
There's also FTC, anti competitive issues that's a big concern. A bid is nowhere near finished and it may take 1 year to play out.
Best play is, wait for paypal to reject this offer. Then re-buy back in when it's cheaper, and wait it out.
But if FTC strikes this down, then it's not something you want to consider buying into immediately.