Thanks for your help.
I had already checked the ethgasstation website, but I was just wondering why do we have to set a 97 Gwei price to run the bancor smartconract all of a sudden. The Ethereum blockchain is apparently totally overwhelmed since 48h. Let's hope it won't rise up again to 1000 gwei or God knows what in a month ... It would neither be good for the Bancor project nor the entire Ethereum blockchain if running smartcontrats becomes so expensive.