I personally do not currently find any relevant source of information if the gas cost of etherium will decrease in the near future, if it happens automatically the cost of gas for bsc will also decrease as well. It cannot be denied that there are already many large projects running on BSC. of course we have more options to choose a quality project, because what I know is the quality of a project is not determined from where their blockchain is, but how the real use and how the dev can attract many investors.