Extension of stay based on the investment. Requirements: 3 million baht since 2020?
Recently googled information about the extension of stay based on investments and found that now is a 3 million baht requirement (condo, bonds, or deposit). Seems it changed from 10 million in 2020.
Sources:
1) Thai Embassy in Vienna
https://www.thaiembassy.at/en/type-of-visa/non-immigrant-visa-b-business-and-work.html
2) Thai Embassy in Singapore
https://www.thaiembassy.sg/visa-matters-/-consular/types-of-visa/non-immigrant-visa-b-business
3) Thai Embassy in Warsaw
https://warsaw.thaiembassy.org/en/page/non-immigrant-visa-b?menu=60f0548f910db13e765640e2
4) Thai Embassy in Canberra
https://canberra.thaiembassy.org/non-immigrant-visa-category-b-non-b/
Also, I found different info on the website of Ministry of Foreign Affairs, Kingdom of Thailand
If investing not less than 2 million Baht, he or she will be granted a 1 year permit.
If investing not less than 10 million Baht, he or she will be granted a 2 year permit.
Source: Ministry of Foreign Affairs, Kingdom of Thailand
https://www.mfa.go.th/en/page/non-immigrant-visa-b?menu=5e1ff6f857b01e00a84023d4