After years of elite status, I have stored up a lot of ff miles - over a million. I rarely use them, since my travel is business (paid for, obviously), and I need to pay for my vacation travel to get me over the 100,000 mile elite status level for top tier status on AA.

So, in other words, I am hoarding miles. Is there any significant downside to this? I anticipate my job chanigng over the years, and I will eventually have the need to use the miles for lots of reasons, but I am years away from it.

Issues:
1. Miles devalue over time... (award tickets go up in miles)
2. What if my carrier goes bankrupt - i know this hasnt affected ff programs before
3. are there any other creative uses? (I could gift them obviously)