I really only realized now, it is something that is expected to continue to develop especially for a country with a low economy and no currency of its own.

For countries like Singapore or other countries that actually have good economic conditions, I don't think they will legalize bitcoin so quickly as a means of payment. Indeed there is something that can be expected to change and regulation could become legal as a means of payment in the future, but the government will not prioritize that. I think they prefer to regulate and formulate good ideas to generate more profit without interfering with other payment systems by not legalizing bitcoin as a means of payment. So, instead of saying they legalized bitcoin, I think regulating it is much more likely for Singapore at this time.