Well, perhaps we can reverse the perspective. Let's think about how it might seem in the future that betting with millibitcoins is normal. Although if the price rises significantly in the future, and millibitcoins seem like a fortune, looking back to that point where people were betting whole bitcoins will be even more impressive. But the fact is that this is many years away. Normally, people who bet with bitcoin are thinking about the equivalent value in dollars or the fiat currency of where they live at the time. If you think about what it might be worth in the future, you HODL.