I have some Virgin Atlantic Flying Club miles I'd really not like to lose if the airline goes bust. Can I use those miles today to book a future flight on Delta, Air France, and/or KLM? Online and/or by phone? Suppose I use Flying Club miles now to book a Delta flight for December, 8 months from now, and Virgin Atlantic goes bust in June. Do I still have my booking on that Delta flight? Any other good strategies for not losing the value of those miles?