When I start betting, it was a local bookmaker I used and they don't accept deposit in crypto, just in fait which was our local currency via bank app transfer or card debit. I started using crypto casinos and bookies few years ago and I doubt I have spent more than $20 worth of Bitcoin to gamble, the truth is that I prefer to deposit USDt than Bitcoin.
That’s understandable since you only registered in 2022. Back in 2017, it was mostly just Bitcoin being used for gambling, super popular at that time. Then later on, casinos started accepting altcoins, but only major ones like Ethereum. Bitcoin wasn't even that expensive before the 2017 bull run. I think around 2016, it was just $500 or so. So if you're really into gambling and could afford it back then, 1 BTC didn’t feel like a big deal.
It makes sense that people where using so much fraction of Bitcoin for gambling back then and that's because it was cheaper and probably many people then did not see the future to be what it is today for Bitcoin growth. I can tell that majority of people now prefer to hold Bitcoin for the sake of making profits and not to spend it on gambling as much as they did before. Even the OP stated he can not spend such fract again today. Like you said, 1 BTC didn't feel like anything then, but today it is really something not to be joked with.