He worried the same problem happened again because he considered as a whale player while Rollbit always checks withdrawals over 10BTC
Casinos usually check the first withdrawal or big withdrawal of their customer. Their FAQs and ToS often have points abiut that too.
They manually check and approve big withdrawals to make sure such withdrawals are not from big wins by cheating or anything relates to money laundering.
FAQ
- Are crypto deposits and withdrawals instant?
Crypto withdrawals are sent out instantly. In rare cases, a withdrawal can be held for review but our team completes these reviews very quickly.
I also don't see any issue at all it's a big amount it's understandable that the casino will have to replenish their hot wallet to complete the transactions if he wants instant he'll better divide his withdrawal into small amounts we cannot guarantee that Rollbit can make an instant withdrawal if there is a huge amount of withdrawal other casino have maximum withdrawal so they can process it in real time.
It does not only relate to hot wallet but also relates to casino investigation on cheating, money laundering, potential hack before they approve withdrawal request with big amount.