Is of even possible for bnt to rise? I guess it's impossible due to the selling and buying of the smart contract at fixed price? It's closely connected to ETH price.
Not sure where you got the idea that there's a fixed price. You can see the price change with every buy and sell at
https://www.bancor.network/bntMaybe he refers to the buyback wall of 1 eth per 100 BNT. Unfortunately, that buyback wall has been gone for weeks now..