These bombings are bound to affect Thailand’s reputation as a “safe” country. If it continues, then you can expect it will have a huge effect on its tourism industry.
While we are lucky to get around 1-3 million foreign tourists per year, Thailand gets something like 10-12 million.
Continued bombings will likely have a significant dent on that industry, not to mention on that country’s investment climate. You put a dent on those industries, & it will hurt the economy. You hurt the economy, & it will likely start some discontent among the people.
If the economic impact is enough, & the Thai government isn’t able to make the necessary adjustments, they could end up in trouble. That’s a lot of “ifs”, of course, but if it pulls thru …