This is certainly something that the Gambling companies do have to look into since this will go long way, thus changes needs to be made, What do you think, how important this option is for you?
From the link, I saw these useful information that will point more to the question you asked:
Choice matters. Bettors expect a wide range of options for making deposits and withdrawals. Some of the options bettors want aren’t even available in the US today.
Experience is everything. Slow deposits and withdrawals are hurting the player experience. The research indicated that the withdrawal process was 10% more painful than depositing. This is probably not surprising given the checks and balances that go into the withdrawal process. However, the research showed that with minor improvements, this process can be sped up significantly. The biggest issue for players was the length of withdrawal time.
Information privacy. This is an area where the difference between frequent and casual really stood out. Casual bettors in particular were wary of sharing additional financial information to sign up. There’s an expectation around privacy and anonymity, to protect personal information.
Preferences. Different bettors have different preferences, particularly frequent vs casual bettors. There is a need for operators to meet the expectations of both early adopters and casual bettors as the industry matures. It’s imperative for operators to retain players they work hard to attract to the site, given the incredible cost of acquisition per player operators spend. Many operators in the US are finding current acquisition costs unsustainable, $1,000+ per player.
About choice, cryptocurrency can be of importance because it is easy and faster to deposit and withdraw with bitcoin, tether or any other cryptocurrency.
What I experienced was slow withdrawal. When I was using fiat to gamble, I use bet365, which I think is not a US company, on the site, deposit is within few seconds but withdrawal takes 7 days or more for wire transfer or so, the only withdrawal option for me.
About privacy, I always think that gambling sites which are centralized will still not have any option than to request for KYC as they are becoming common and known to the government of the country that they are.