BTC price itself don't really affect my gambling habits but there is some else that does. It is the transaction costs. When the tx costs low, I can send btc to the casino for a cheaper price and that makes me play more frequently. It makes more sense to deposit money while the cost of making a tx is cheaper obviously. However, btc price can sometimes affect the tx costs because the higher the btc goes, the more popular it gets and the more popular it is, the more people rush to the exchanges and that drives the tx costs up. So, I can tell you I often don't like to gamble when btc is going up. In these situations btc prices affect me in a negative way indirectly.