This is why if you like to gamble it is a good idea to have a small stash of altcoins that have very cheap fees and that you can use in the case the bitcoin and the ethereum network get really busy, litecoin and dogecoin are good options for this, especially dogecoin which not only can get you a fast confirmation but the huge amount of dogecoin I get for my bitcoin makes me feel I am betting a lot of money when in fact I am just betting a few dollars.
It is a fact that i am mostly wagging with dogecoin or XRP whenever the price of bitcoin starts to rise and especially when the network is congested i will always go for alts that could confirm in a short period of time. The price of bitcoin does affect my gambling as i will tend to take less risk when waging with bitcoin whenever there is a rally but i care less when waging with doge irrespective of the market.