Dear Sineenat,
Please follow my comments as;
1. As chapter 1, add some statistic of golden sales per month or year at the research area.
2. please make more your concentration 1 more page, why you need to do research at this area and what the real reasons are. Plus references are the last sentences of each paragraph.
3. please recognize that what your exact population and reference source are before you wrote it in your proposal.
4. All your variables are wrong. please do chapter 2 Lliteratre review at the second step and then you will select the true variables as well as put in your conceptual framework.
5. please rewrite your definition due to be wrong of all.
if you have any question, please do not hesitate to contact me any time.