Lets say I'm a company that paid to use factom. Factom saves it's hashes to the bitcoin blockchain. If Bicoin fails. I will lost all my fund?
No. Factom has it's own Blockchain and that's the place for companies. It also puts hashes in the bitcoin-blockchain to proof it wasn't altered in any way. If Bitcoin would fail the history would still be there (in Factom of course but also the history in Bitcoin). And more important: Factom can do that with any Blockchain and most likely they will do it with others.
There are or were plans to anchor in Ethereum as well:
Factom Plans To Anchor Into Ethereum Blockchain
http://themerkle.com/factom-plans-to-anchor-into-ethereum-blockchain/I don't know if that is still the plan after the hard-fork. But in general: Factom is not dependent on Bitcoin. If we think two and more years into the future and expect other big blockchains it's likely that they will anchor in and connect to others as well.
By the way: That's another great point in Factom that it's kind of complementary to a lot of potential Blockchain-projects. There are many potential scenarios for "win-win-situations".
Edit: I also thought about "bitcoin-fail-scenarios". And I believe it could hurt the price if a catastrophic-event in Bitcoin would happen "now" (or the next weeks or months). But it even could be the opposite because many would try to get rid of their Bitcoins and buy into other projects.
And what I expect in the next 12 months is a hard fork of Bitcoin and that we could have to face a scenario like we see it with ETH and ETC. I can't know it, but it's possible that there will be Bitcoin like we know it and a "new Bitcoin" with bigger Blocks. That's one reason why I don't hold much in Bitcoin even if some believe it should shoot up because of the halving - possible of course. But I expect troubles.
For Factom it could even be an interesting scenario, because Factom could anchor in both and it could be helpful in future regarding the block-size-problem. Safe is in my opinion: It won't be boring.