Bitcoin has very strong security but there are always ways to steal your coins, for example key logger virus, wallets with a malicious code, even old time stealing could pose a threat if someone stole your computer or your hardware wallet with your bitcoin.

2 years ago I think I obtained a small profit and then I spend it all. Since then I have been in love with bitcoin

It really depends right now I’m not holding  a lot of bitcoin so I could start over very easily but if it happened when I had good holdings of bitcoin I will probably leave for a while.

The Walking Dead is my favorite by far

My computer is 6 years old, but since I don’t do anything on it except surf the web and print files I don’t see any reason to upgrade.