Dude, watch this:
https://www.youtube.com/watch?v=ncPyMUfNyVMYou don't understand how Bitcoin and the blockchain works. The amount of computational power you would need to severely disrupt the network at this point is just ridiculous, and they would lose tons of money trying to do so. They would gain way much more money by being good actors. Learn how the consensus algorithm works before you drop your next FUD thread.
Attack or not, bitcoin will be replaced. Lack of development.
Are you nuts? There is tons of development happening. Just look at the Mailing list. Instead of rushing things out, the developers are going through it slowly and carefully because new stuff in Bitcoin can adversely affect a lot of stuff, so they need to be careful. There is plenty of development and lots of testing and careful consideration before something is ready to be released.