SEOUL: Some South Koreans are waiting for the right opportunity to buy their dream homes in Seoul, as steeply rising bank interest rates are making them think twice before taking out loans.    They are still adopting a wait-and-see approach, even as home prices start to drop.    The Olympic Park Foreon residential project, for instance, was once expected to be highly sought after among South Koreans looking to own homes in the capital. The development is designed to accommodate more than 10,000 households.   But with bank interest rates on the rise, it is becoming a hard sell. Some buyers have also admitted that it was not an easy decision.   “Of course it’s difficult when interest rates are high,” said one resident. “I had worries about coming here to sign this contract too. But since the location is good, I just decided to go ahead with the contract.”