Yes definitely I have had some unexpected experiences of losing Bitcoin and it was my own fault. Once, when I was transferring Bitcoin from my wallet to an exchange, I accidentally changed a digit in the middle of the address, which resulted in my Bitcoin being lost forever. Although it was my mistake, fortunately the amount of Bitcoin was very small, only $53 worth of Bitcoin. As a result, I later copied and pasted the Bitcoin address very carefully. Basically, I made such a mistake due to the pressure of my fingers and one digit changed, resulting in my Bitcoin loss.