Sportsbet.io has a live roulette from evolution gaming and the min bet listed there is 1-2mbtc. Just search for bitcoin casinos that have those curacao gaming license (bitcoinpenguin,bitstarz,sportsbet) most of them have the same providers. Other roulette sites like bitdouble and bitsler have lower minimum bets why not just play those kind of roulette are they different from the live ones?