it possible to hack your bitcoin from your wallet?
yes! the hacker can get your Bitcoin from your wallet,
perhaps they can copy your key, so be very careful to getting away with it.
for them not to get rich at once.

right, like a The DAO cases get attacked by a hacker and $60 million is stolen. a hacker can steal your bitcoin from some ways they can try. an old method using malware to stole your data,account,and password and for expert hacker exactly the DAO cases using code to infiltrate in your wallet.
You need to run your Virus scanner Weekly or Daily if possible, to avoid virus and malware and get them out of your PC.
Use Linux it has the most invulnerable security in my opinion alternatively it is the most unexploited OS from hacker.