I've been thinking about Manna lately and I feel like they are begging to be hacked in the future. They are using the same hashing algorithm as bitcoin and are paying miners peanuts. What is to stop a big Bitcoin miner from turning all their hash power to Manna for a 51% attack? Seems like a real possibility if Manna gains enough value.

Also, the foundation controls 10 billion coins and the website seems centralized as well. Sometimes I feel like Manna is doomed to be attacked if it gains too much value.