Try turning off your Internet connection while it's importing. Does it keep importing? If not, you're not using the bootstrap file. It shouldn't be that slow.
If you stop and restart the client it will continue where it left off.
It says "Importing blocks..." and continues from where it stopped, but it is incredibly slow. Probably going to take several days at least. I'm running it in a virtual machine (as some other altcoins), but it is still too slow.
What is the expected probability/percentage of staking?
I know nothing about probabilities but I do know that with small amount of coins staking outside of just-dice or other pool might be a bit unconvenient/difficult.