The hacker stole my bitcoin two day ago,a small amount , less than 0.2BTC, I want to know how can I protect my coins,if a large number of bitcoins I know I use offline wallet, but a small amount of Bitcoins,I only set the password, but it seems not enough.
Since you haven't specified the wallet you used and how you lost your bitcoin, I can only give you some general suggestions.
Scan your computer for malware now.
Don't download or run suspicious program.
Don't click links in emails.
Enable 2FA if you are using a web wallet.
thank you ,i now Storage all my coins on the exchange,like:OKCOIN.
i don't want to update the large number of blocks data.
Don't store your coins on an exchange, if that exchange pulls a MtGox, you're screwed.