I think BTC will be totally fine. It has staying power and doesn't make any claims to be more than what it is. Proof of concept is solid, and now its all just about tweaking it. I did see something slightly problematic last night though where some researchers found 8 instances of child pornography images saved onto BTC blocks which could really fuck stuff up because that would make accidental possession of one of those blocks super illegal. People might not want to risk it if this becomes more prevalent