The highest price bitcoin may get is upto 50k usd I doubt that there will come a time it will reach 100k usd it was not realistic ! if bitcoin may reach 100k usd I dont think there will be a transaction being process since the fees will become terribly to high
price has nothing to do with fees. # of transactions has to do with fees. If Bitcoin fixes scalability, fees will go back to cents no matter how high the price is.