Just had my DTV approved. Remote work as a day trader (Stocker Trader). I applied through the New York office in US (online) as I am American. I submitted most recent bank statement showing adequate funds, a cover letter explaining I was self employed working for myself and listing my additional attachments of the following to show this - trades year to date (2 individual brokerage accounts), my most recent monthly brokerage statements for each account, the most recent crypto statement for the one account I have crypto in, and my last years tax return. I was never asked for any further paperwork. My status went from pending document approval, right to pending final approval a day later, then reverted back to pending document approval around 10 business days into the process, where it stayed for 1 day before returning to pending final approval. It took exactly 15 business days (As was listed on the website). There were not any data points I could find for this type of remote work anywhere, so I was pleasantly surprised to get approved. I do have a very good passive income which allows me to travel and also explained this in my cover letter (its supported by my tax return). I put all of this all in one pdf and compressed it to submit on the webpage. Hope this helps others.

Thank you all for your information about marriage extension documents. I have another thing I would like to get your thoughts on. I have had over the required 400,000 baht in my bank account for over two months but, one week ago when it was small was late at night and I was tired. I was moving my from one account to the other. I accidentally moved too much money out of 400,000 baht, bringing a little bit lower than the required 400,000 baht. 

I was stunned when I realised what I had done and I immediately put the money back in bringing it back over 400,000 baht. So it can be seen on my statement that the account went below the required amount for less than one minute. I assume/hope that will not be a big issue.