yes that is a potential option for some , it's not what most do however ..Most sit 800k in a bank account and don't touch it , the true cost of this is around 80k PA .
So , back to my original answer , it all comes down to a stagnant 800k sitting doing nothing .
It always just takes one f wit , with no idea , hence laughing emoji ( idiot ) again standard practise when you have multiple pieces of tech , but of course not EVERY person will be questioned , neither is EVERY person who is doing something questionable or illegal for that matter as that would be impossible ..
Have been questioned yes , an IT bag 2 lap tops and some phones , it's not uncommon to be asked , could be working illegally , or carrying out other activities that are illegal .
Reasonable questions , just have the correct answers .
Your 800k will most probably be okey , it's a good system here , and my world standards they are doing alright , however in the sums for this transaction you need to consider what the actual cost is , bcoz it's a wasted resource sitting there
You also need to consider that via any reasonable measure the Baht is way too high , and has been for quite a while , this will correct at some point as there will be no other way .
But , you ask a good question , no one can say in absolutes , and I'd take a holistic approach when looking at this Visa , these are wonderful for the banks , free usage of a giant long term pool , just as insurance works .