Not only professionals but I think many players who don't have poker rooms near by and who don't want to provide their credit card/personal info to the other online sites who don't accept Crypto Currencies as their payment method prefer playing at BTC/Crypto accepting poker sites.
The things that are stopping players from playing at these poker rooms are, lack of trust/players. Most BTC poker players prefer playing at Freeroll tourneys whereas the professional poker players wants busy ring tables.
The part where you say, "... players who don't have poker rooms near by..." really made me think. This isn't really in contrast or opposition to what you said... Just my 2-cents on how screwed up some things here in the US are.
I can't stand that the US imposes blockades on the internet for folks who want to gamble online. Anti-gambling legislation is a relic of the Old West. Laws were made against it because there were people dying all to regularly when being accused of cheating. The only reason it's still in place is because of religious fuddy-duddies who don't understand that Americans are supposed to have liberty and freedom.
I think its actually lobbying by Nevada and the Indian casinos. I live almost walking distance from a casino, and yet playing for money at a friends house down the street is technically illegal. So is playing online. Its just ridiculous.
As far as online poker, I am always nervous that the would be somehow rigged, so I am too scared to ever play it
As to professional players, sure maybe some people can do that but if I tried it I am sure I would end up real poor real quick!
