I am sure there are people in very different situations, but the information/rumors I have heard is at least some private schools and universities have seen a pretty substantial decline in enrollment for the coming term and the personnel concern of the leaders of many organizations here in Thailand is to try to not shed too many jobs while cutting costs elsewhere.
Although I am sure enrollment might not be an issue at government schools, budgets will be. We are currently in a situation where there are hundreds of millions of unemployed people globally and governments and other organizations have incurred additional costs and are looking for ways to cut expenses. This doesn't seem like the time most English teachers in Thailand are in a strong bargaining position. Although if you are in the field of medical research I suspect you would be in a much stronger position.
It is always difficult to give general advice as each person has different goals and opportunities, but it might be a good idea for many teachers to take what is offered, within reason, and wait until the situation approves before expecting to be able to bargain with employers from a position of strength. Like at all times, one should take the best offer one has, but I suspect there will be fewer and fewer attractive offers for English teachers in Thailand in 2020, English teachers are non-essential personnel right now.
Being an optimist is helpful to motivate oneself but it does not change the economic and political environment we are working in.