there can be many reasons and most of them lead to a very simple answer: "I would choose none of the altcoins" and the reason is even simpler. because if the biggest thing out there with the most adoption, the longest time being around, with the best and biggest developers working on it such as Satoshi and Hal Finney,... and a lot more, if this fails i wouldn't even consider an altcoin which is a copy of bitcoin in 90% of cases and they don't even have half the development team!
maybe the sheer weight of vested interests and warring camps is exactly what might end up screwing everything up. there's probably at most a few hundred or low thousands of individuals who have control over this thing and at are each other's throats.
on the other side there's a few million people who want something that simply works and has a secure and bright future. i don't believe they have infinite patience for turf wars. forgetting price and market action for a moment, coins such as litecoin look like a much more peaceful and constructive scene right now.
of course all of bitcoin's problems could transfer elsewhere but there's time for other coins to take what's been learnt and apply it before all the assholes descend. segwit on litecoin would be a prime example of this.