If there was better upside, I'd be buying $10 put options right now.
Margins are very tight on space travel and unless we're in an era where we're building spaceships that hold thousands of people and can travel across the galaxy, or they're going to be mining asteroids soon, I think it's way way too early to invest in space travel. Investing in space companies now would be like investing in Technology stocks in the 1930s.
But then again...people are nuts and might take SPCE to a $100B valuation before they head for the exits and take it back to $1b.