I like the low house edge, smooth design and the option of investing in the bankroll. The latter might seem suspicious to potential investors, though, because you're new and it's thus unclear whether you are to be trusted (the provably fair game is one thing, sending out the payments to the winners and to investors is another). There are many websites these days, so you'll face strong competition, but good luck!
Even if the minimum bet is 25k Satoshi ($2.5 indeed seems too high, but I guess the owners got the message already), Bitcoin Lightning Network is worthy of consideration. Because the withdrawal and deposit Bitcoin fee can be worth a couple of such bets these days... And if the minimum bet is going to be reduced, it will be even more appropriate to think about the LN.