Bitcoin would be perfect for this! Knowing how close paypal is following the bitcoin technology and growing economy, I'm sure they know that.
PayPal goes galactic to answer big questions about money in space
http://www.theverge.com/2013/6/27/4468000/paypal-goes-galactic-to-answer-big-questions-about-money-in-space
no bitcoin not worth the time to read.
Coindesk did not agree with you, apparently:
http://www.coindesk.com/bitcoin-the-inter-galactic-currency-of-the-future/
If this topic was moved from press to off-topic, barely because the word "bitcoin" did not appear plain text in the article, that was a short sighted view. Or coindesk might be as off-topic as me!