The hot wallet can be refilled every hour. If you are trying to withdraw <1 BTC but hot wallet is empty it goes to warm wallet to be accepted manually. Yes it'

The hot wallet can be refilled every hour. If you are trying to withdraw <1 BTC but hot wallet is empty it goes to warm wallet to be accepted manually. Yes it's inconvenient. But between inconvenience and losing $5,000,000 If attacker steals X from hot wallet the admins may detect suspicious activity (when hot wallet is drained entirely they must reaudit everything). Even if they don't notice anything the attacker gets 2X. While warm wallet is something like 100X