Well, you shouldn't trust, just calculate your profit\risks ratio. You definitely shouldn't hold that 1m$ here, but sell some service with almost immediate BTC withdraw could worth it.

Another one attempt to answer your main question. Lets imagine money workflow.

Client wants to get some currency to buy some good\service, he'll buy it on free market or mine it by himself. In result clients pay to Intel and electricity provider to get medium of exchange. History over, first money holder took the risks here. So actual question for him is - will he be able to sell it month later with the same exchange rate (or what discount will be)? The risks are:
1. Fbi arrests the server, some attack happens, all hardware along with backups fails. Most severe case, there are some ways to mitigate consequences but discount will be big.
2. Mining alg cracked, asic appears, admins print huge amount of money. There will be some reasonable daily limit of mining withdraw so we'll be able to catch emergency cases, algs will be adjusted to existent hardware. We'll not print much because it's a long term story for us, nobody will just throw out the reputation.
3. Economy behind will shrink, trust will fall (if somebody will use as medium of saving too), competitors will rise, velocity of circulation rise. Required money supply shrink too, price will go down. Possible but it's long time processes, it can't happen fast.

As i said, calc it on your own, if the risks are too high for you then sry for bothering.