This is something we all should take note of, I for one don always check the currency that I'm betting with all the time. I only just glance at the currency at the start of the game and once I begin gambling I'm no longer concerned with the currency because depending on the game you'll have to pay more attention as not to be distracted.
So just like in your case, I think I'm also prone to making this kind of mistake, thank you for sharing.
I do not make this kind of mistake because I can not joke with money, or because I use one domination to bet all the time, unless the type of game I choose is requesting me to change the denomination, there are games like that. If not like that, I prefer to use mBTC to gamble. But most of the time now during bear market, I use USDT while going back to BTC after significant bear market. In short, always try to use one particular domination is better.