Danny, I am using Bitcoin Core, and have encrypted my wallet with a strong passphrase. Is having the passphrase sufficient protection even if someone else has my wallet.dat? Would changing my passphrase increase my security, or should I just follow the steps you laid out?
yes, anyone who has access to your encrypted wallet.dat can try brute force the pass. But if your pass is original, and strong (various combination of numbers, special signs, min. 8 char. long) there is nothing to worry about.
also do not say to anybody how much btc this wallet control. no loot = nobody will try to break pass.