No, a Destination Thailand Visa (DTV) is not a tourist visa. It's specifically designed for individuals intending to travel to Thailand for purposes such as work, study, or other long-term stays, rather than for tourism. If you're looking for a tourist visa, you would typically apply for a different type of visa specifically meant for short-term visits.
In regards to currency in Laos. I just returned from 4 days in Vientiane, the Laos kip I would say is best to use. Some places may accept dollar but with varying exchange rate along with Thai baht.
In Laos, the official currency is the Lao Kip (LAK). Other commonly accepted currencies include the US Dollar (USD) and, to a lesser extent, Thai Baht (THB). While the kip is the primary currency for transactions, many businesses, especially in tourist areas, will accept US dollars.
Yes, a stateless person can apply for a Thai visa, but the process may vary based on individual circumstances and the type of travel document available. It's best to consult with the nearest Thai embassy or consulate for specific requirements and guidance tailored to stateless individuals.