that's not correct.
I put 100m on bid - all my money. after 10 minutes some of my items sold and I got another 10-20m, 1 min left: I see that current bid is getting closer to my bid, I want to add that 20m to my bid but cannot, as result when ~5sec left, somebody killed by bid and I did not have a time to re-bid it on 120m. Result: item was bought out for 105m, I lost item, because do not have a time to make a 120m bid.
you CAN increase your bid if you are the winning one BUT like in your example if you place all your gold on an item (the gold gets placed as a bit) and want to increase it, you will need at least the same amount of gold again.
Example: you place 100 mil and you have got 20 left. now you get 30 mil from selling stuff and you want to increase your bid to 150, but the bid is at 100 mil and to increase to 150 you need 150 on hand not counting whats already placed on the item. so since you only have 50 mil you cant place it
I dont have another 150m, I have 100m on my bid and +20m that I want to add to my bid, can you understand that?
I do know that I can increase my bid by making higher bid, but I should have enough money, so this is not my case.